The Aya Sofya is a church-turned mosque. It was formerly called the Hagia Sophia and is now included among the greatest houses for devotion in both Christianity and Islam. Back in the 6th century it was built as a church by the Byzantine ruler Justinian. Later the conquering Ottomans had converted it into a mosque and added new religious symbols. Today it’s a museum representing Byzantine architecture and the glorious era. The dome-upon-dome construction is a clever form of architect and the interior is like a vast golden shell admired by all.