Hagia Sophia, located in Istambul, was built in 537 AD. It was at first a Greek Orthodox Christian cathedral, which became an imperial mosque during the Ottoman Empire and, currently, it is a museum.
This building was famous in particular for its huge dome. It was the world's largest cathedral and an engineering marvel of its time. It is considered the climax of Byzantine architecture.
It was constructed between 532 and 537,during the ruling of the bizantine emperor Justinian I, and it designed by the Greek geometers Isidore of Miletus and Anthemius of Tralles. Anyway, the church was embodied within the Bizantine Empire or Eastern Roman Empire, so the influence of Roman forms of art was crucial too.
