Saint Catherine's Monastery

Listen first. The wind moves down the granite slopes with a dry, steady hiss, and somewhere inside the walls a wooden board is struck with a mallet — a slow, hollow rhythm that calls the monks to prayer. The air is thin and cool here, even when the sun is hard on the stone. Around you, the mountains are red, grey and ochre, cracked into great blocks. And in the middle of this bare valley stands a fortress of pale stone. It has been a working monastery for roughly fifteen centuries.

This is Saint Catherine's Monastery, at the foot of the mountain that tradition identifies as Mount Sinai. Local Arabic speakers call that peak Jebel Musa, the Mountain of Moses. For Jews, Christians and Muslims, this valley is tied to the story of Moses and the giving of the law. The monastery is Greek Orthodox. It is often described as one of the oldest Christian monasteries that has been lived in without a break. Monks have prayed here, day after day, since late antiquity.

The walls you see were raised on the orders of the Byzantine emperor Justinian in the sixth century. Byzantium was the eastern Roman Empire, ruled from Constantinople, today's Istanbul. Monks and hermits were already living in these valleys before then, drawn by the holy mountain and by the silence. But they were exposed to raiders. Justinian gave them stone walls, a basilica and a garrison. Look at the thickness of those granite walls — this was built to be defended, not only to be admired.

Here is a detail many visitors miss. For centuries, there was no easy way in. Travellers and supplies were often lifted up the wall in a basket or by rope and winch, through an opening high above the ground. You can still see traces of that arrangement on the walls. The small doorway you use today feels almost modest beside the old defences. It reminds you how isolated this place once was, many days' journey across the desert.

At the heart of the monastery is a living plant. Tradition holds that this is where Moses saw the bush that burned but was not consumed. A green bramble grows near the Chapel of the Burning Bush, and the monks regard it as the same plant, or its descendant. Locals say cuttings taken from it elsewhere never take root — treat that as a story, not science. The chapel itself sits behind the altar of the main church and is treated as especially sacred ground.

The main church, the basilica, also dates to Justinian's time. Its heavy wooden doors and roof beams are among the oldest parts of the site. Inside, the light is dim and golden. Oil lamps hang from the ceiling on long chains, and their glass catches the glow. High in the apse, the curved space behind the altar, a sixth-century mosaic shows the Transfiguration — the moment when Christ appears in shining light to his disciples. It is one of the finest early Christian mosaics to survive anywhere.

Now for a surprise. Inside these Christian walls stands a small mosque, with its own slim minaret. It was built in the medieval period, during the rule of the Fatimids, a dynasty that governed Egypt from Cairo. Why is it here? The usual explanation is that it served Muslim visitors and protected the monastery in a mostly Muslim land. Whatever the reason, the two towers stand side by side, the minaret and the bell tower, and they have shared this courtyard for nearly a thousand years.

That relationship has a famous document attached to it. The monks keep a copy of a text known as the Ashtiname, which they describe as a letter of protection granted by the Prophet Muhammad to the monastery. Historians debate whether the text is authentic, or a later creation. Tradition says the original was taken to Istanbul by an Ottoman sultan, who left a copy behind. Either way, the document carries an old idea: that this place should be left in peace.

The monastery's greatest treasures are often the quietest. Its library holds one of the most important collections of early manuscripts in the world, in Greek, Arabic, Syriac, Georgian and other languages. It is often ranked second only to the Vatican for early Christian texts. The most famous book connected to it is the Codex Sinaiticus, a fourth-century Greek Bible. In the nineteenth century, most of its pages left the monastery, and many are now in the British Library in London. The monks still regard that departure as a loss.

Another surprise waits among the icons. An icon is a sacred painted image used in Orthodox prayer. In the eighth and ninth centuries, much of the Byzantine world went through a period called Iconoclasm, when religious images were destroyed. This remote monastery was largely out of reach. So some of the earliest icons in existence survived here, painted in hot wax on wooden panels. One sixth-century image of Christ shows the two sides of his face slightly different, as if one half is gentle and one half stern.

Not every room is about beauty. Outside the main walls, in the garden, there is a charnel house, a place where the bones of monks are kept. The ground here is rocky, and there is little space for graves, so after burial the bones are later gathered and stored together. Skulls are stacked in neat rows. It can feel strange at first. But for the community, it is a calm reminder that the brothers who lived here before are still part of the place.

The monastery has never stood alone. The Jebeliya, a Bedouin tribe of this region, have long worked alongside the monks as guides, gardeners and guards. Local tradition says some of their ancestors came here as soldiers and workers sent by Justinian. Many of the guides who lead pilgrims up the mountain at night come from these families. Above the monastery, a path and a long stairway of stone steps climb the slopes toward the summit, where many people wait for sunrise.

Before you leave, stand still in the courtyard for a moment. Feel the cool shade of the old stone, and notice how the walls frame a narrow strip of very blue sky. Somewhere above, the mountain rises in silence. Monks have looked at this same view for centuries, through raids, empires and long, quiet winters. As you walk back through the small doorway, listen again for the wind on the granite — and for the slow, wooden rhythm that still marks the hours here.