Patmos and the Cave of the Apocalypse

1. Where Patmos Is

Patmos is a small Greek island in the Dodecanese, in the eastern Aegean, lying off the coast of Asia Minor, which is modern Turkey. Revelation 1:9 names it as the place where John was when he received the visions written down as the Book of Revelation, and the island has been a Christian destination on that account for many centuries. The Cave of the Apocalypse sits on the hillside between the port of Skala and the hilltop town of Chora, and the fortified Monastery of Saint John the Theologian stands on the ridge above both.

The island is small, rocky and deeply indented, with a narrow waist that nearly cuts it in two. Boats arrive at Skala, the harbour on the eastern side, which is the island's working town. From Skala the ground rises steeply to the south and west, and the white block of the monastery is visible from the water long before anything else on the island resolves into detail. Chora, the old town, is wrapped around the monastery walls in a dense cluster of whitewashed houses and vaulted lanes that were built to be hard to read from the sea.

The island's place in the ancient world

In the first century Patmos belonged to the world of the Aegean city states and the Roman province of Asia. The great cities of that province lay on the mainland opposite and slightly north: Ephesus, Miletus, Smyrna, Pergamum. A boat could reach the island from that coast in a day of reasonable sailing, which matters for reading Revelation, because the seven churches the book addresses are all in that same province and all within reach of the same sea lanes. Patmos sat within easy reach of that coast while remaining marginal, small and quiet, which in Roman terms is exactly what made it a plausible place to send a troublesome man.

Why the island is protected

Patmos carries an international designation for its Christian heritage. UNESCO inscribed the historic centre of Chora, together with the Monastery of Saint John the Theologian and the Cave of the Apocalypse, on the World Heritage List in 1999, treating the three as a single site: a place of pilgrimage, a monastic foundation of continuous life since the eleventh century, and a town that grew in the shelter of both.

Source: the UNESCO World Heritage List entry for the historic centre of Chora with the Monastery of Saint John the Theologian and the Cave of the Apocalypse on the island of Patmos, inscribed 1999.

2. What Scripture Says About Patmos

Scripture mentions Patmos exactly once, in Revelation 1:9, where the writer says he was on the island called Patmos on account of the word of God and the testimony of Jesus. Every later tradition about the island, the cave and the writing of the book is built on that one sentence and on what follows it in the next few verses.

The verse does three things at once. It gives a name, John. It gives a relationship, brother and fellow sharer in tribulation, kingdom and endurance, which is the language of someone writing to people under pressure rather than the language of an official. And it gives a cause: he is there on account of the word of God and the testimony of Jesus, a phrase that in Revelation regularly describes people who suffer for preaching (compare Revelation 6:9 and Revelation 20:4).

What happens next in the text

Revelation 1:10 places John in the Spirit on the Lord's Day, and says he heard behind him a loud voice like a trumpet. The voice tells him to write what he sees in a scroll and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicea (Revelation 1:11). He turns to see the voice, sees seven golden lampstands and one like a son of man among them, and falls at his feet as though dead (Revelation 1:12 to 1:17). The rest of the book follows from that commission.

Two details from those verses shape how the island has been remembered. The first is that the vision is dated to the Lord's Day, the Christian Sunday, which is why the cave has always been treated as a place for liturgy rather than a museum. The second is that the command is to write. A book was produced on that island, or at least begun there, and the physical business of writing gave later tradition its furniture: a place to sit, a ledge to lean a scroll on, a scribe to take dictation.

What the verse does not say

Revelation 1:9 does not say John was in a cave. It does not say he was in chains, in a mine, or under guard. It does not name an emperor, give a year, or describe the island. Those details all come from later Christian writers and from local memory on Patmos, and they carry the weight that those sources carry. Holding the two apart, what Scripture states and what tradition adds, is the honest way to visit the place, and it costs nothing devotionally. For the contents and meaning of the book itself, see our guide to the Book of Revelation and how Catholics read it.

3. Why John Was on the Island

The oldest Christian explanation is banishment. Writers from the second century onward say John was sent to Patmos as a punishment for preaching and was released after the emperor who exiled him died. Irenaeus, the earliest of them, places the apocalyptic vision near the end of the reign of Domitian, who ruled from 81 to 96.

The early witnesses

The relevant testimonies are few and they are worth naming individually, because they do not all say the same thing.

Each entry summarises the cited passage of the named ancient author. The wording above is a paraphrase, not a quotation. The dates are the conventional scholarly ranges for those works.

What Roman law would have called it

Roman practice knew several ways to remove a man from public life without killing him. Relegation to an island, relegatio in insulam, kept a citizen's status and property while confining him to a fixed place. Deportation, deportatio in insulam, was harsher and stripped both. Condemnation to the mines, damnatio ad metalla, was harsher still and normally fell on people of low status. Victorinus assumes the mines. Most later readers have assumed relegation, which fits a man who could write, receive news of seven mainland churches, and send a letter to all of them.

The scholarly caution

A number of modern historians point out that no surviving Roman source describes Patmos as a penal colony, and that the island's ancient remains look like those of an ordinary small Aegean community with a fortified acropolis, a gymnasium and a cult of Artemis. On that reading John may have been relegated there for a period, or may have withdrawn there under pressure, and the later Christian picture of a prison island is a development rather than a record. The honest statement is that Scripture says he was there and gives the reason as the word of God and the testimony of Jesus, the early Church remembered it as an exile under Domitian, and the legal form of that exile is not documented.

Why the date matters and where it stops mattering

The date of Revelation is argued between a late setting under Domitian around the middle 90s, following Irenaeus, and a minority case for a setting in the late 60s. Our guide to the Book of Revelation and how Catholics read it works through the evidence on both sides; what matters on the island is that Catholic teaching does not require either date. Nothing in the book, on either date, permits anyone to calculate a timetable for the end. Jesus states plainly that no one knows the day or the hour, not the angels, not the Son in his human knowledge, only the Father (Mark 13:32), and the Church has repeated that against every attempt to set a date. Our guide to what the Church teaches about the end times sets out the boundaries.

4. Which John Was on Patmos

The book identifies its writer simply as John, a servant of Jesus Christ and a brother of his readers (Revelation 1:1, 1:4, 1:9 and 22:8), without calling him an apostle. Christian tradition from the second century identifies him with John the son of Zebedee, the apostle associated with Ephesus, and that identification stands behind the name of the monastery on Patmos, which is dedicated to Saint John the Theologian.

The traditional identification

Justin Martyr, writing in the middle of the second century, refers to the Apocalypse as the work of John, one of the apostles of Christ. Irenaeus, who claimed to have heard Polycarp of Smyrna, treats the author of the Gospel, the letters and the Apocalypse as one man, the disciple of the Lord who lived at Ephesus into the reign of Trajan. That is the tradition the Eastern churches carry in the title Theologian, which in Byzantine usage marks the evangelist above all others because his Gospel opens with the eternal Word.

The ancient objection

Dionysius, bishop of Alexandria in the middle of the third century, compared the Greek of the Gospel of John with the Greek of the Apocalypse and concluded they were by different hands. Eusebius preserves his argument at length in Ecclesiastical History 7.25. Dionysius accepted the Apocalypse as inspired and did not dispute its place in the Church, and his point was about authorship: the Gospel writer never names himself, the Apocalypse writer names himself repeatedly; the vocabulary and grammar differ; there were, he noted, several men named John at Ephesus. Eusebius elsewhere reports from Papias a distinction between John the apostle and a John the Elder, which some ancient and many modern readers connect to the same question.

Where that leaves a Catholic reader

The Church receives the Apocalypse as canonical and inspired Scripture, and canonicity does not depend on settling the identity of the human author. Catholic scholarship today runs across a range of positions: the apostle himself, a disciple of the apostle writing in his tradition, or a distinct Christian prophet named John known to the churches of Asia. Our guide to the Book of Revelation and how Catholics read it sets out the authorship evidence in full. What matters on Patmos is narrower: the liturgy and the shrines keep the traditional name, and a pilgrim standing in the cave is standing in a place associated with John the Theologian by many centuries of Christian memory. Our life of Saint John the Apostle and Evangelist tells the story the tradition hands on, from the Sea of Galilee to Ephesus.

5. The Cave of the Apocalypse

The Cave of the Apocalypse is a small natural grotto in the hillside between Skala and Chora, shown by island tradition as the place where John received the visions. The grotto has been built into over the centuries, so a visitor now enters through a courtyard and a chapel and comes down into the rock rather than walking into an open cave mouth. The site is a dependency of the Monastery of Saint John the Theologian, staffed by monks, and the Divine Liturgy is celebrated inside it.

What you actually walk into

The approach is from the road that climbs from the port to the old town, or on foot up the old stepped path that the same road replaced. A white complex of low buildings and cells clings to the slope. Steps go down through a covered walk into a court, then into the chapel of Saint Anne, which was built against the mouth of the grotto and now forms its entrance. The cave itself opens off that chapel to the right, low and irregular, with the living rock forming most of the ceiling and one wall.

The space is small. A dozen people fill it. The rock is dark, blackened by centuries of lamps and candles, and hung with silver lamps and icons. A silver icon of John dictating to his scribe is set near the traditional writing ledge. The floor is paved. Everything else is stone that has been there since long before anyone thought to build a church against it.

The monastery of the cave

The grotto has its own small monastic house, the Monastery of the Apocalypse, which serves the shrine and stands under the great monastery on the ridge. Alongside it on the same slope is the island's ecclesiastical school, the Patmias, a seminary foundation of the early eighteenth century which trained clergy through the Ottoman centuries and gave Patmos a reputation for learning well beyond its size. The school building and the shrine share the hillside, and the arrangement is deliberate: a place of vision and a place of study, on the same ground.

The Patmias ecclesiastical school is dated by its own foundation tradition to 1713 and attributed to the monk Makarios Kalogeras. Institutional foundation dates of this kind rest on the institution's own records.

How the identification stands

No inscription, document or archaeological find fixes this particular grotto as the site of Revelation 1:9. The identification is a local tradition, attested by the monastic settlement that grew around it and by the pilgrims who came, and it is old. What can be said with confidence is that Christians have prayed in this cave for a very long time, that the Church has honoured it as the memorial of the vision, and that veneration of a place does not require certainty about its geology. A pilgrim who kneels there is honouring the event, and the event is in Scripture.

6. The Marks Shown in the Rock

Visitors to the cave are shown four features of the rock, each attached to a moment in the tradition of how the book was received and written. The monks point them out, the guides repeat them, and they are the reason people leave the grotto remembering it as a room with furniture rather than a hole in a hill.

The triple fissure

A crack runs across the ceiling of the cave and divides into three near the far end. Island tradition holds that the rock split when the voice of God spoke, and reads the three branches as a sign of the Trinity, one voice from one God in three persons. A pilgrim is told that the voice of Revelation 1:10, loud as a trumpet, came through that fissure. The reading is devotional and it is old, and the fissure is the feature of the cave that visitors describe most often afterwards, which is a fair measure of how firmly it has fixed itself in the island's memory.

The hollow for the head

A worn depression in the rock at floor level is shown as the place where John laid his head to rest. Silver has been set around it. Pilgrims touch it as they pass, which is the ordinary Christian instinct at a holy place and which the Church has never treated as superstition when the honour passes through the object to the person and to God.

The handhold

A second worn place in the rock wall, higher up, is shown as the handhold John used to pull himself upright, an old man rising from the floor of a cave. The detail is humble and it is the one that tends to stay with people. Whatever its history, it points at something true about the book: Revelation 1:17 says the seer fell at the feet of the one he saw as though dead, and had to be raised.

The writing ledge

A shelf of rock at about desk height is shown as the surface on which the text was written down, with the scribe kneeling or seated beside it. The icon of the dictation hangs nearby. That ledge carries the whole tradition of the next section.

7. Prochoros and the Dictation Tradition

Byzantine tradition holds that John dictated the Apocalypse on Patmos to a disciple named Prochoros, who wrote it down. The scene is one of the standard subjects of Orthodox iconography, an old man seated or standing with his hand raised toward heaven and a younger man at his feet with a scroll or codex on his knee, and it is the image hanging in the cave beside the ledge.

Where the tradition comes from

The source is an apocryphal work known as the Acts of John by Prochorus, a Greek narrative usually dated to the fifth century, which tells the story of John's exile on Patmos, his miracles, his contests with a magician, and the writing of the Gospel and the Apocalypse at his dictation. The Prochoros of the title is identified with the Prochorus listed among the seven chosen to serve tables in Acts 6:5. The identification is the work of the narrative rather than of the New Testament, which says nothing further about that Prochorus.

The Church has never received the Acts of John by Prochorus as Scripture, and Western scholarship treats it as legendary hagiography. Its influence on art and on Patmos is very large all the same. The iconography of the dictating evangelist entered Byzantine art and stayed, and the island's sacred geography, the cave with a writing ledge and a place for a scribe, is a stone version of that painting.

The magician Kynops

The same narrative includes John's contest with a sorcerer named Kynops, whom John is said to have overcome, and who was turned to stone and sank in the harbour of Skala. A rock in the bay is pointed out as the result. The story belongs to a family of apostolic legends in which the preacher defeats a local magician, patterned on Peter and Simon Magus in the Acts of Peter. Recognising the genre is the right response, and it does not require sneering at the fishermen who still steer around the rock.

What the tradition preserves that is true

The dictation tradition holds on to something the text itself insists on. Revelation is a written commission from the first paragraph: write in a scroll and send it to seven churches (Revelation 1:11), write to the angel of the church in Ephesus (Revelation 2:1), write this, for these words are trustworthy and true (Revelation 21:5). A book was made. Ancient books were normally made by dictation to a trained writer, as Paul's letter to the Romans records in the greeting of Tertius, who wrote it down (Romans 16:22). A scribe on Patmos is entirely plausible even where the fifth century story around him is not history.

8. The Monastery of Saint John the Theologian

The Monastery of Saint John the Theologian was founded in 1088 by Saint Christodoulos, a monk who had led communities in Asia Minor and on Kos before he obtained Patmos from the Byzantine emperor Alexios I Komnenos. The grant was made by chrysobull, a document sealed with the emperor's gold seal, and it handed the whole island to the monastery. The building on the ridge above Chora has been a monastic house continuously since.

The chrysobull of Alexios I Komnenos granting Patmos to Christodoulos is dated 1088 and is preserved in the monastery's own treasury, where it is displayed as the foundation document of the house.

Christodoulos

Christodoulos Latrinos had been driven from monasteries in Asia Minor by Turkish advances before he came to the Aegean, and Patmos was in part a refuge for a displaced community. His rule for the house survives in his own testament and typikon. He did not have long on the island: raiding forced the community off Patmos during his lifetime and he died on Euboea in the 1090s. His body was brought back, and his relics lie in the monastery church in a silver reliquary, venerated by the community that he founded and by pilgrims who come for the cave and stay for him.

Why it looks like a castle

The monastery is a fortress because it had to be. The Aegean between the eleventh and the eighteenth centuries was raided by pirates and contested by Byzantines, Venetians, Genoese, Knights of Rhodes and Ottomans in turn. The house answered with high grey walls, buttresses, towers, a single defensible gate and a bent entrance passage, and Chora grew tight against the walls so that the town and the monastery formed one defensive mass. A visitor climbing the last lane sees almost no windows, which is the point.

Inside the walls

Beyond the gate the monastery opens into a small irregular courtyard with an arched portico, and off it the katholikon, the main church, built in the founder's own time and extended by chapels. Frescoes cover the church and the chapel of the Theotokos beside it, in layers of different centuries, with the earliest cycles from the twelfth century and later work from the Cretan school painters who decorated much of the Greek world after the fall of Constantinople. The refectory, with its long stone tables, the old bakery, the cisterns and the roof terraces are part of the visit.

Its standing in the Orthodox Church

The monastery is stauropegic, meaning it stands directly under the Ecumenical Patriarchate of Constantinople rather than under a local metropolitan. That status was granted to protect the house from local interference and it has been kept. The abbot of Patmos, in consequence, has an unusual standing in the Greek Orthodox world for the head of a house on a small island. The community keeps the Byzantine rite in Greek. Orthodox jurisdictions differ over the calendar used for fixed feasts, so a pilgrim planning a visit around a particular saint's day should confirm the date with the house rather than assume it. Our overview of the Greek Orthodox Church, its structure and its beliefs gives the wider frame.

9. The Treasury, the Library and the Relics

The monastery holds a significant collection of Byzantine and post-Byzantine material still kept in the place that produced it: imperial documents, icons, manuscripts, liturgical silver and vestments, much of it displayed in a treasury museum inside the walls. The collection exists because a fortified house on a small island under patriarchal protection was one of the safer places in the Aegean for eight hundred years.

The documents

The founding chrysobull of Alexios I Komnenos heads the archive, and around it sits a long series of imperial, patriarchal and later Ottoman documents confirming the monastery's rights over the island and its properties elsewhere. The archive is a working source for Byzantine social and economic history, used by historians for what it records about land, taxation and monastic estates rather than only for what it says about Patmos.

The manuscripts

The library holds a large collection of manuscripts, among them early biblical and patristic codices. Among its biblical holdings is a group of leaves from a sixth century Greek gospel book written in silver and gold on parchment dyed purple, a luxury imperial-quality manuscript whose surviving leaves are now divided between Patmos and several other collections around the world.

Scholarly catalogues list this purple gospel book as Codex Petropolitanus Purpureus, designated N or 022 in the standard Gregory-Aland numbering of New Testament manuscripts, with its leaves dispersed between Saint Petersburg, Patmos and several other holdings.

The icons

The icon collection runs from Byzantine panels through the Cretan school masters of the sixteenth century, who worked for Orthodox patrons across the Venetian-ruled Aegean and whose style also decorated the churches at the Meteora monasteries in Thessaly. A mosaic icon of Saint Nicholas is among the older pieces. The point for a pilgrim is that an icon in this museum was made for the church next door, by painters working for this community, and several of them are still carried in procession.

The relics of the founder

Christodoulos lies in the katholikon in a silver reliquary. Orthodox and Catholic practice on relics is the same in principle: the body of a saint is honoured because it was the instrument of a holy life and is destined for resurrection, and the honour terminates in God. The Second Council of Nicaea in 787, which both communions receive, settled the veneration of images on the same logic, distinguishing the honour given to a saint or an image from the worship due to God alone.

10. Chora, Skala and the Rest of the Island

Patmos is a working Greek island with a small permanent population, a port town, a hill town, farms, chapels and beaches, and the pilgrimage sites sit inside that ordinary life rather than replacing it. A visitor who stays more than a few hours will see far more of the island than the cave and the monastery.

Skala

Skala is the harbour and the island's centre of business, strung around a wide bay on the eastern side. Ferries come in here, the shops and offices are here, and the road to Chora starts here. Above the town rises Kastelli, the hill carrying the remains of the ancient acropolis with its fortification walls, which is the main visible evidence of the pre-Christian island. Down at the waterfront a small church marks the place where tradition says John baptised converts, and the rock associated with the Kynops legend is pointed out in the bay.

Chora

Chora is the old town on the ridge, built up against the monastery walls in a knot of lanes too narrow and too irregular for a raiding party to move through quickly. The houses are white, cubic and mostly seventeenth and eighteenth century, and the wealthier ones are captains' and merchants' mansions from the period when Patmos traded across the Ottoman Aegean. Dozens of small chapels are worked into the fabric of the town, many of them family foundations opened once a year for their patron's feast. The view from the monastery terraces takes in a large part of the Dodecanese on a clear day.

The rest of the island

Beyond the two towns the island holds convents and small monastic houses, of which the convent of the Annunciation, Evangelismos, and the convent of Zoodochos Pigi in Chora are the ones pilgrims most often ask about. There are bays and beaches on both coasts, a fertile valley at Kambos in the north, and a scattering of chapels on the headlands. Grikos, on the east coast, sits below a hill with a hermitage cave attached to a later monastic tradition. None of this is dressed as a pilgrimage circuit, and walking between the sites on the old paths is the way the island was crossed for most of its history.

The walk from Skala to the cave and Chora

An old stepped path, a kalderimi, climbs from Skala past the cave and up to Chora, and it is the historic route that the modern road replaced. Walking it takes the visit out of the category of a coach stop. The climb is steep and exposed, and pilgrims who want the traditional approach usually go up early in the day. Our guide to what a pilgrimage is and what the Church teaches about it explains why the effort of the approach has always been treated as part of the devotion.

11. The Island's Liturgical Year

Patmos keeps the Byzantine liturgical year, and the days that matter most on the island are the feasts of Saint John the Theologian and the ceremonies of Holy Week. The cave and the monastery are working churches with a daily cycle of services, so the calendar governs when a visitor can enter and what a visitor will see.

The feasts of Saint John

The Orthodox calendar keeps the repose of Saint John the Theologian on 26 September and a second commemoration on 8 May, and both are major days on Patmos, with vigils and processions. The Latin calendar of the Catholic Church keeps Saint John the Apostle and Evangelist on 27 December, in the octave of Christmas, which is why a Catholic pilgrim's own feast day for John falls at a different point in the year from the island's.

Holy Week and the Niptir

Holy Week draws pilgrims from across Greece. The ceremony particular to Patmos is the Niptir, the washing of the feet, performed on Holy Thursday in the main square of Chora, where the abbot of the monastery washes the feet of twelve monks in a public re-enactment of John 13:1 to 13:15. The gospel of that rite is John's own account of the supper, which gives the ceremony a particular weight on an island dedicated to him. Easter services follow the full Byzantine order, with the midnight Resurrection service the summit of the year.

The daily round

Outside the great feasts the monastery and the cave keep the ordinary Byzantine cycle: vespers in the evening, orthros in the early morning, the Divine Liturgy, and the reading of the hours. Shrines close to visitors while services are in progress and reopen afterwards. A pilgrim who arranges a visit around a service rather than against one sees the place doing what it exists to do. Our guide to visiting Orthodox monasteries as a pilgrim covers what to expect of the hours, the gate and the guest quarters across the Orthodox world.

12. Patmos and the Seven Churches

Revelation was sent from Patmos to seven named congregations on the mainland opposite: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicea (Revelation 1:11). All seven were real cities in the Roman province of Asia, all lie in modern western Turkey, and their sites can be visited today, which makes Patmos one end of a route rather than an isolated destination.

The circuit the letters imply

The order of the seven in Revelation 1:11 follows a plausible courier route: north up the coast from Ephesus to Smyrna and Pergamum, then inland and south through Thyatira, Sardis and Philadelphia to Laodicea, then back toward Ephesus. Read that way the book is a circular letter with a delivery plan, and the geography is one of the arguments that its author knew the province at first hand.

What each city contributes

Each of the seven letters in Revelation 2 and 3 uses local detail: the lampstand at Ephesus, the crown and the martyrdom at Smyrna, the throne of Satan at Pergamum where the imperial cult and the altar of Zeus stood, the trade guilds at Thyatira, the sudden fall of the acropolis at Sardis, the open door at Philadelphia, and the lukewarm water and the eye salve and the banking wealth at Laodicea. The letters are pastoral corrections and encouragements to particular congregations with particular problems, and every one of them ends with a promise to the one who conquers.

Our guide to the seven churches of Revelation and what each letter says works through them one by one, and our guide to Christian sites in Turkey covers the archaeological sites themselves along with Ephesus, Nicaea, Antioch and Cappadocia. For the visions that follow the letters, see our guides to the seven seals and the four horsemen of the apocalypse.

The line back to Patmos

The island's own significance depends on the mainland. A man on a small rock in the Aegean wrote to seven congregations under pressure from a hostile culture, told them what he had seen, and told them to hold on. Standing in the cave without knowing what he wrote is a wasted journey. Reading the seven letters before going, or afterwards, is what turns the visit into something.

13. Public Revelation and Private Revelation

The visions on Patmos belong to public revelation, which means they form part of the deposit of faith contained in Scripture and handed on by the Church, and every Catholic is bound to receive them. Private revelations, including approved apparitions, hold a different place. The Catechism teaches that public revelation is complete in Christ and that no new public revelation is to be expected before his glorious manifestation (CCC 66 and 67), and that private revelations serve to help people live the one faith more fully in a particular period without correcting or completing it.

Why the distinction matters at a shrine

Patmos and Lourdes are treated differently by the Church for a reason that is easy to state. The Book of Revelation is inspired Scripture, read at Mass, binding on faith. An apparition site rests on a judgement about a private revelation, and even the strongest approvals never oblige belief in the same way. A pilgrim who blurs the two ends up either treating Scripture as optional or treating a private message as canonical, and both mistakes do real damage.

How the Church now judges private revelations

On 17 May 2024 the Dicastery for the Doctrine of the Faith published Norms for Proceeding in the Discernment of Alleged Supernatural Phenomena. Under those norms the Church ordinarily does not declare an alleged apparition supernatural. Six possible conclusions are provided: nihil obstat, meaning devotion is permitted with no declaration of supernatural origin; prae oculis habeatur; curatur; sub mandato; prohibetur et obstruitur; and declaratio de non supernaturalitate. Our guide to Marian apparition sites and where each one stands with the Church sets out how each major site is currently classified and how the older cases were judged under a different framework.

What Revelation does not license

Nothing in the book gives anyone a calendar. Jesus says that no one knows the day or the hour (Mark 13:32), and Acts 1:7 records him telling the apostles that it is not for them to know times or seasons fixed by the Father's authority. Every generation that has tried to read a date out of Revelation has been wrong, and the Church has consistently refused to bless the attempt. What the book requires is readiness now, which is a matter of repentance, sacraments and charity rather than a matter of arithmetic. Our guide to what the Church teaches about the second coming holds that line.

14. A Catholic Visitor at Patmos

A Catholic can visit Patmos with a clear conscience and real profit, as a guest. The cave and the monastery are Greek Orthodox houses, the community is Orthodox, and no Catholic indulgence or devotion attaches to the site. Understanding that from the start makes the visit easier for everyone at the gate.

Where the two communions stand

The Catholic Church and the Orthodox Church have been out of full communion since the estrangement conventionally dated to 1054 and hardened over centuries, and the questions still open include the authority of the Bishop of Rome and the Filioque. The Catholic Church holds that the Eastern churches possess true sacraments, above all the priesthood and the Eucharist, by apostolic succession (CCC 1399). That is the ground on which a Catholic venerates freely on Patmos and still does not present himself for communion there, because intercommunion would state a unity that does not yet exist and the Orthodox houses themselves do not offer it. Our guide to the Great Schism of 1054 and what actually divided East and West gives the history, and Eastern Orthodox beliefs explained sets out the doctrine.

One distinction is worth keeping straight. Greek Orthodoxy is Eastern Orthodox. The Oriental Orthodox churches, meaning the Coptic, Armenian, Syriac, Ethiopian, Eritrean and Malankara churches, are a separate communion that divided after the Council of Chalcedon in 451 and are not in communion with the Eastern Orthodox. Our guide to the Oriental Orthodox churches explains the difference.

Dress and conduct

Shoulders and knees covered, for everyone, at the cave and at the monastery. Men in long trousers, women in a skirt below the knee, and sleeveless tops refused at both. Hats off inside. Voices low, and silence in the cave itself, which is small enough that one loud conversation ruins it for everyone else in the room. Photography inside is normally forbidden and should never be assumed. Services take priority over visits, and a closed door during the liturgy is not an obstacle to work around.

What to do while you are there

Read Revelation 1:9 to 1:20 in the cave, quietly, which takes three minutes and is the reason to be there at all. Venerate the icons if you wish, since Catholics receive the same council that defined the practice. Light a candle. Pray for the community that keeps the shrine and for the unity of the Church, a prayer both traditions have asked for and which nobody on that hillside will object to. Leave an offering if the house takes one. Then move on and let the next group in.

Bringing it home

The useful part of Patmos travels. A man in a cave on the Lord's Day, praying, was given a vision of the risen Christ walking among the lampstands of seven struggling congregations and told to write it down for their sake. What that asks of a reader is available anywhere: keep the Lord's Day, read the book, pray for your own struggling congregation, and hold on. Our guide to making a pilgrimage without leaving home covers what to do when the journey is not possible, and the full list of Christian pilgrimage sites covers where else to go.

15. Frequently Asked Questions