5 Stories About Hagia Sophia in Istanbul You Haven't Heard

Ask anyone in Istanbul to name the building they would show a visitor first, and most will say the same thing: Ayasofya. We just call it that, the way you might say “the cathedral” in your own city. It is the most photographed roofline in town and probably the most argued-over building in the world. But the famous facts (1,500 years old, that impossible dome, church then mosque then museum then mosque again) only get you so far. The real fun is in the smaller stories, the ones a good guide will lean in and tell you when the crowd thins out. Here are five of my favourites, all true, all worth knowing before you walk in.

Quick practical note before we start, because it changed recently. Since January 2024 foreign visitors no longer enter the main prayer floor as tourists. You go in through a separate route and up to the upper gallery, which is actually the best vantage point for most of the stories below. At the time of writing the foreign-visitor ticket is around 25 euros, and it is a working mosque, so dress modestly and skip the short windows around the five daily prayers. For the fuller backstory and timeline, my Hagia Sophia facts and history guide covers the ground the audio guide rushes through.

1. The church that beat every construction record

Before you cross the threshold, know this: you are looking at the third Hagia Sophia, not the first. The building the Byzantine emperor Justinian inaugurated in 537 (so roughly 1,500 years ago) went up on the still-smoking ruins of the second church, which itself stood on the foundations of the original from the year 360. The first one left nothing behind, but you can actually spot a piece of the second one. Just before the entrance, on your left, look for the remains of the first five steps and a fragment of a sculpted frieze carved with sheep. Most people walk straight past it.

What still stops me cold is how fast they built it. Justinian’s church went from foundation to consecration in a little under six years. Five years and ten months, to be precise. For a stone basilica of this scale, that is genuinely hard to believe. For comparison, Notre-Dame de Paris took the better part of two centuries. The Blue Mosque facing it across the square took seven years, and that was a thousand years later with far better tools. You can only imagine the army of workers and the pressure they were under. Justinian had given a blank cheque on the budget, so the taxpayer footed the bill while the deadline did the rest.

The minarets, the buttresses, the fountain, the mihrab and the minbar came later, Ottoman additions to Justinian’s shell. But the core, the part that still dazzles, is the nave and the dome: roughly 31 metres across and 56 metres high. Stand under it and the floor feels small. Right now there is restoration scaffolding climbing toward the dome (a 43-metre rig went up after months of load testing), but the major mosaics stay uncovered and the sense of scale is untouched. If domes and grand interiors are your thing, the Suleymaniye Mosque up the hill is the masterpiece to pair it with.

2. The empress who kept re-touching her own face

Up in the southern gallery you will find a mosaic of Empress Zoe and her husband Constantine IX flanking Christ. Look closely and you are actually looking at a Byzantine edit job. Constantine was Zoe’s third husband, so the face and the inscription beside Christ were scraped out and redone three times to keep up with her marriages. And Zoe, never one to miss a chance, had her own portrait reworked each time too, slimmed and softened to look younger after every wedding. Call it the eleventh-century version of a retouched photo. The craftsmanship is so fine you would never guess.

Zoe’s life is the kind of story you wish came with a TV series. Daughter of Emperor Constantine VIII, she grew up shut away in the gynaeceum, the women’s quarters, kept well clear of temptation until her first marriage at around fifty. Husband one, Romanos III, did not last: she had him quietly removed after six years, reportedly with help from her lover, whom she promptly married and crowned as Michael IV. When he died of illness a few years later, his nephew Michael V took the throne and tried to pack Zoe off to a convent. After fifty years behind walls, she was having none of it. The people rose for her, Michael V was the one who ended up blinded and exiled, and Zoe sailed on. In 1042 she married husband three, the younger Constantine IX, and the two of them ruled together (his mistress reportedly part of the household arrangement) until Zoe died in 1050. The face on the wall outlived all three men.

3. The Viking who carved his name in the marble

Stay in the upper gallery and head toward the Deisis mosaic. On the marble parapet there, faint and easy to miss, somebody scratched a line of runes more than a thousand years ago. Scholars date the graffiti to roughly the ninth century, and the rough translation reads “Halfdan carved these runes.” A Viking, in other words, signed the wall of the greatest church in the Christian world and went home.

It is not as random as it sounds. While Byzantium ran much of the Mediterranean, the Norse were raiding and trading across the north, and the two worlds met. From the tenth century, Emperor Basil II made it formal by creating the Varangian Guard, an elite unit of Scandinavian mercenaries who served as the emperor’s personal protection and stuck around, on and off, into the fourteenth century. Halfdan was almost certainly one of those northern soldiers, bored during a long service and leaving proof he had stood exactly where you are standing. Worth noting: tracing it with your own finger is strictly forbidden, and the marble has earned its rest. For more on the city’s church history, the churches to visit in Istanbul round-up is a good next stop.

4. Gli, the cat who out-charmed a president

Anyone who spends a day here learns fast that the cats run Istanbul. They turn up in shops, on cafe chairs, on mosque carpets, everywhere. Hagia Sophia had its own celebrity resident: a green-eyed tabby named Gli, born inside the building in 2004 and raised within its walls.

Gli’s claim to fame was a 2009 visit. When US President Barack Obama toured Hagia Sophia, Gli let herself be petted in front of the world’s cameras, entirely unbothered by the security or the moment, and the photos went everywhere. She picked up a Facebook following and the kind of devotion usually reserved for actual royalty. Honesty time, because the old guidebooks get this wrong: Gli passed away in November 2020 at the age of sixteen and was buried on the grounds. So you will not meet her in person any more. But her story is the perfect introduction to the city’s love affair with its street cats, which I get into properly in cats in Istanbul: 10 interesting facts. And do not worry: new cats have already claimed the place, because they always do.

5. The wishing column that grants you one turn

Save a minute for this on your way out, ideally before you leave the nave area. Near the northwest you will notice a knot of people doing something odd: bunching around a single column, arms twisted at a strange angle. That is the wishing column (the locals call it the sweating column), and the ritual has been running for centuries.

The legend traces back to Justinian himself, who supposedly leaned his aching head against this column one day and felt his headache vanish on the spot. From there the column collected every virtue going: it heals the sick, it grants wishes, it is even said to help women conceive. Today a copper plate covers the spot, worn through to a thumb-sized hole. You push your right thumb in, make a wish, and try to sweep your palm in a full circle without lifting it. If your thumb comes out damp, the story says your wish is granted. People with an ache somewhere then touch the wet thumb to the sore spot for relief. The romantic explanation calls the moisture the tears of the Virgin Mary; the dull-but-likely one is plain condensation on cold marble.

There is a second layer to the legend. Some say the column was blessed long before the building existed, by Gregory the Wonderworker, a third-century bishop from Cappadocia. That is not impossible, since the columns were salvaged from older monuments across the empire. And after Mehmed the Conqueror took the city in 1453 and turned the basilica into a mosque, a new story grew: a divine hand began to rotate the whole building toward Mecca, got interrupted by a startled passer-by, and stopped a few degrees short. The thumb-and-palm circle, some say, is people trying to finish the turn. Most just make a quiet wish, just in case.

That is the first five. There are plenty more where these came from, but walk in with these and Hagia Sophia stops being a checklist and starts being a place with secrets. If you are sketching out a Sultanahmet morning around it, the Blue Mosque, Topkapi Palace and the Basilica Cistern are all a short stroll away, and you can do the whole cluster in a single packed day.