Saint Catherine's Monastery — officially the Sacred Autonomous Royal Monastery of Saint Catherine of the Holy and God-Trodden Mount Sinai — stands at the foot of Jabal Musa (Mount Sinai) in Egypt's Sinai Peninsula, built by order of the Byzantine Emperor Justinian I between 548 and 565 CE. Wikipedia confirms it is the world's oldest continuously inhabited Christian monastery, a distinction Father Justin of Sinai underscored to Gates when he noted the monastery "has never been abandoned and never been destroyed in 1,700 years." The complex encloses what tradition holds to be the Burning Bush of the Book of Exodus, a site already described by the pilgrim Egeria as early as 383 CE, and sits amid three mountains, with the peak of Jabal Musa roughly 2 km to the south. Its library preserves an extraordinary collection of rare manuscripts and early Christian icons, including works such as the Codex Sinaiticus and what Wikipedia identifies as the earliest known depiction of Christ Pantocrator. Recognized as a UNESCO World Heritage Site in 2002 for its unique importance to Judaism, Christianity, and Islam, the monastery also contains a Fatimid mosque built in 1106 CE that remains preserved within its walls. Gates investigated the site as part of a two-episode exploration into the historical evidence surrounding Moses and the Exodus narrative.
Pilgrim Egeria visits and records the Burning Bush and a chapel beside it, providing one of the earliest written accounts of the sacred site.
Emperor Justinian I orders construction of the fortified monastery enclosing the site of the Burning Bush.
A Fatimid mosque is built within the monastery complex, reflecting the site's cross-religious significance.
Saint Catherine's Monastery is inscribed as a UNESCO World Heritage Site for its importance to the three Abrahamic religions.
Gates investigates the monastery in Expedition Unknown S10E11 'Mysteries of Moses' and S10E12 'Chasing the Mysteries of Moses.'
Father Justin of Sinai, the monk who guides Gates through the monastery, situates the site within both religious tradition and documented history. He points out that the Burning Bush's presence at this location was recorded as early as the 4th century by the pilgrim Egeria, grounding the monastery's central claim in one of the earliest surviving pilgrimage accounts. The monastery's 1,700-year unbroken occupation is itself remarkable — Father Justin tells Gates it has "never been abandoned and never been destroyed" — and that continuity is part of what makes Saint Catherine's a living archive as much as a religious institution.
Mainstream historians and archaeologists regard Saint Catherine's as genuinely one of the most important repositories of early Christian material culture in the world. Its library holds the Codex Sinaiticus, among the oldest and most complete manuscripts of the Christian Bible, as well as the Syriac Sinaiticus and a collection of early icons that predate the Byzantine iconoclasm. Wikipedia notes the library contains what is identified as the earliest known depiction of Christ Pantocrator. The UNESCO designation in 2002 acknowledged that the monastery's significance transcends any single faith tradition, citing its importance to Judaism, Christianity, and Islam — the latter evidenced by the preserved Fatimid mosque within its walls dating to 1106 CE.
The genuinely debated question — whether Jabal Musa is the actual biblical Mount Sinai — remains unresolved among scholars. Several competing locations have been proposed across the Sinai Peninsula and beyond, and no archaeological evidence has conclusively confirmed the site of the Exodus events. The monastery's association with Mount Sinai rests on centuries of tradition and pilgrimage rather than on stratigraphic or documentary proof from the biblical period itself.
Gates' two-episode investigation is candid about these limits. Rather than pressing for a verdict, he uses the monastery as a point of entry into the broader Moses investigation, and his on-camera reflection in S10E12 is notably measured: the visit, he says, "hasn't been about proof" but "an exploration of faith." That kind of honest framing is consistent with the monastery's own nature — a place where history, tradition, and belief have been carefully tended side by side for more than fifteen centuries.
Saint Catherine's Monastery is confirmed by Wikipedia as the world's oldest continuously inhabited Christian monastery, occupied without interruption since its construction between 548 and 565 CE.
The monastery's library holds the Codex Sinaiticus, one of the oldest and most complete manuscripts of the Christian Bible, as well as the Syriac Sinaiticus.
A Fatimid mosque built in 1106 CE stands preserved inside the monastery walls, reflecting the site's recognized significance to Islam as well as Christianity.
The Burning Bush venerated at the monastery was already described by the pilgrim Egeria in 383 CE — more than 150 years before Justinian ordered the current monastery built around it.
Saint Catherine's Monastery is generally accessible to visitors, though opening hours are limited and the monastery is a functioning religious community, so guests are expected to dress modestly and observe the rules of the site. Check current Egyptian tourism advisories and the monastery's official guidance before visiting, as hours and access policies can change. The surrounding Sinai Peninsula requires travel coordination, and many visitors base themselves in the town of Saint Catherine nearby.
The town of Saint Catherine (Sharm El-Sheikh is the nearest major resort city, approximately 180 km to the southeast); Cairo is roughly 400 km to the northwest.
Autumn and spring (October through April) are generally considered the most comfortable seasons, avoiding the intense summer heat of the Sinai desert. Early mornings are recommended both for cooler temperatures and for the experience of climbing Jabal Musa at dawn, as many pilgrims do.
UNESCO World Heritage Site (inscribed 2002)
Jerusalem
Jerusalem sits at the heart of the same Abrahamic religious tradition Gates explores in the Moses investigation, and has been featured across multiple Expedition Unknown episodes examining biblical history.
Holy Land
The Holy Land investigation sites connect directly to Gates' broader Expedition Unknown inquiry into the historical evidence surrounding the stories of Moses and the Exodus.
Jordanian Desert
The Jordanian Desert lies along the geographic corridor associated with Exodus traditions, making it thematically linked to Gates' two-part Moses investigation that centers on Saint Catherine's and Mount Sinai.
Historical data sourced from Wikipedia