For almost 1,000 years, Hagia Sophia was the biggest cathedral in the world and is still a fantastic structure to set eyes on.
For almost 1,000 years, Hagia Sophia was the biggest cathedral in the world and is still a fantastic structure to set eyes on. Originally built as an Eastern Orthodox Cathedral in 537 AD when Istanbul was named Constantinople, Hagia Sophia became an Ottoman mosque from 1453 and is today a museum for all faiths to enjoy.