Photo: Hagia Sophia - Ayasofya

Hagia Sophia from inside with a scaffolding. A very impressive building errected 1500 years ago. The current building was originally constructed as a church between 532 and 537 AD on the orders of the Byzantine Emperor Justinian. It is one of the most important sights of every Istanbul visit and pictured from outside on almost every postcard.

more background on:

http://en.wikipedia.org/wiki/Hagia_Sophia