Basilica of Saint John the Theologian

Listen for a moment. Under your shoes, loose grit and old marble crunch softly. Wind moves across the top of Ayasuluk Hill. It carries the smell of dry grass and, in season, the faint sweetness of fig trees from the gardens below. Around you, rows of pale columns stand against the sky. Some are white marble, some are grey, and most hold up nothing at all. You are standing inside the ruins of one of the largest churches of the early Christian world.

This is the Basilica of Saint John the Theologian, in the town of Selçuk on Turkey's Aegean coast. Christian tradition holds that John, one of the twelve apostles of Jesus, spent his final years in nearby Ephesus. According to that tradition, he was buried here, on this low hill above the city. The church was built over the place believed to be his grave. That belief is the reason everything around you exists.

The hill's name also tells the story. Saint John was known in Greek as Hagios Theologos, which means "the Holy Theologian." Over many centuries of local speech, those words wore down into "Ayasuluk." That is the name the hill and its castle still carry today. So every time a local says "Ayasuluk," they are saying a very old, worn-down version of Saint John's title. This is one detail most visitors walk past without noticing.

The church you see is not the first one on this spot. In the fourth century, a smaller memorial church stood over the tomb. Its roof was made of timber. As pilgrims arrived in growing numbers, that modest building was no longer enough. Then, in the sixth century, the Byzantine emperor Justinian ordered a far grander replacement. Justinian is the same emperor who built the great church of Hagia Sophia in Constantinople, today's Istanbul.

Justinian's basilica was laid out in the shape of a cross. Its roof was not flat. Instead, a row of domes covered the nave and the transepts, the long central hall and its two side arms. The building was made of brick and stone, with marble columns and marble floors. Builders here, as across the region, reused stone from older monuments. Some blocks probably came down from ancient Ephesus. Look closely at the masonry, and you may spot pieces that clearly belonged to an earlier building.

Now walk toward the centre of the cross, where the arms meet. Here you will find a marble slab on a raised platform, framed by four columns. This marks the place traditionally identified as the tomb of Saint John. It is a quiet spot. Many visitors stop here longer than anywhere else. Some pray. Others simply stand and look. Whatever you believe, this small square of stone was the reason for the whole building.

In the Middle Ages, pilgrims came here from across the Christian world. Legend has it that a fine dust rose from the tomb each year on the saint's feast day. Pilgrims collected it and believed it could heal the sick. This is folklore, not documented fact. But it shows how deeply people trusted this place. For medieval travellers, Ephesus was one of the great pilgrimage stops of the eastern Mediterranean.

On the north side of the church, look for the remains of the baptistery. It is a separate structure with an eight-sided plan. In the early church, new believers were baptised by full immersion, stepping down into water. Eight sides were common for baptisteries. Christians linked the number eight with new life and resurrection. Standing here, you can still trace the shape of the basin where that ritual took place.

The basilica's story did not end with Byzantium. In the fourteenth century, Turkish rulers took control of the area, and the church was converted into a mosque for a time. Later, earthquakes brought down the domes and much of the walls. Over the following centuries, the site slowly fell into ruin. Stone was carried away for other buildings. What you see today is partly the result of careful restoration work in the twentieth century. Archaeologists raised many of the fallen columns back into place.

Turn now and look at the walls around the church grounds. The whole hilltop was fortified in Byzantine times. Raids and wars made the region unsafe, and the walls protected both the church and the people who lived around it. You probably entered through a large stone gate. It is known as the Gate of Persecution. The name came from a carved relief once set above it. Later viewers believed it showed Christians being persecuted. In fact, the scene came from Greek legend, the story of the hero Achilles.

From the edge of the site, the views open up in every direction. Above you, on the summit, stands the castle of Ayasuluk. Below, at the foot of the hill, you can see the Isa Bey Mosque, a fourteenth-century building with a stone courtyard. Further out, in the flat ground, a single rebuilt column marks the site of the Temple of Artemis. That temple was one of the Seven Wonders of the ancient world. Pagan, Christian, and Muslim history all sit within one glance.

That view tells you something about Selçuk itself. This small town has been a holy place for thousands of years, for very different faiths. The goddess Artemis was worshipped on the plain. Saint John was honoured on the hill. Later, the call to prayer rose from the mosque below. Each group built here, and each reused stone left by the one before. The ruins around you are not one moment in history. They are many layers stacked on top of each other.

Before you leave, stand still once more between the columns. Notice how the light changes on the marble as the sun moves. Listen for the birds in the trees, and the distant sound of traffic in the town below. As you walk back toward the gate, look down at the worn floor stones. For more than a thousand years, pilgrims, soldiers, monks, and travellers have walked this same ground. Today, you are one of them.