The Basilica Cistern (Yerebatan Sarayi) is an ancient cistern lying beneath the city of Istanbul, Turkey. It dates to the 6th century.
The Deesis mosaic in the Hagia Sophia church in Istanbul, Turkey dates from 1261.
View of the Golden Horn in Istanbul, Turkey with the Hagia Sophia and Blue Mosque in the background.
View of the Blue Mosque in Istanbul, Turkey from Hagia Sophia.