The current Hagia Sophia was built in the 6th century when Constantinople — as Istanbul was then called — was the heart of the Orthodox Christian Byzantine Empire that emerged as Ancient Rome ...

The Hagia Sophia remains a highly popular tourist destination, attracting millions of travelers. Here is a detailed look at this ancient UNESCO World Heritage Site in Istanbul, Turkey.

Bigger and better. The current Hagia Sophia was built in the 6th century when Constantinople — as Istanbul was then called — was the heart of the Orthodox Christian Byzantine Empire that ...