The Hagia Sophia is a former Greek Orthodox patriarchal basilica, which later became a mosque and is now a museum. Famous in particular for its massive dome, it is considered the epitome of Byzantine architecture. It was the largest cathedral in the world for nearly a thousand years, until the completion of the medieval Seville Cathedral in 1520.
- A former basilica and mosque
- Now a museum famous for its dome
- Was the world’s largest cathedral until 1520