This is maybe the first graffiti in Hagia Sophia's history! 

"Halvdan was here!" was written by one of the Vikings who came to Constantinople during the Byzantine period!

Is Hagia Sophia a church, mosque, or a museum? This magnificent structure embodies all these titles, even though it's officially designated as a mosque. You won't be disappointed when you hear the amazing stories behind this stunning work of art!

While planning your trip, take note of this hidden gem: the neighborhood of Balat is a colorful place with historical buildings and cultural significance. It's worth visiting!

Hundreds of cisterns, underground water containers, were built in Constantinople to provide water for the public during the Byzantine era. Did you know that the Basilica Cistern was the largest one? It's waiting for us to experience its mystical atmosphere...