Ottoman architecture is the architecture of the Ottoman Empire which emerged in Bursa and Edirne in 14th and 15th centuries. The architecture of the empire developed from the earlier Seljuk architecture and was influenced by the Byzantine architecture, Iranian as well as Islamic Mamluk traditions after the conquest of Constantinople by the Ottomans. For almost 400 years Byzantine architectural artifacts such as the church of Hagia Sophia served as models for many of the Ottoman mosques.