Little Hagia Sophia. This church was formerly the Church of Saints Sergius and Bacchus.
The church of Saints Sergius and Baccchus marks the first of the city’s harbors on the Marmara Sea.
No interior decoration remains. Notice how the orentation of worship changed. When it was a church the priest and people faced the east, that is, ad orientem when they prayed; the altar is the center of the apse. However Muslims pray facing Mecca so the prayer niche faces Mecca and is to the right.