Thousands of Muslim faithful made their way to Istanbul’s landmark Hagia Sophia on Friday to take part in the first prayers in 86 years at the structure that once was one of Christendom’s most significant cathedrals, then a mosque and museum before its reconversion into a Muslim place of worship.

Turkish President Recep Tayyip Erdogan is scheduled to attend the inaugural prayers inside the sixth-century monument along with around 500 dignitaries, as he fulfills what he has described as the “dream of our youth” anchored in Turkey’s Islamic movement.