Interior view of the Hagia Sophia, showing Islamic elements on the top ofthe main dome, Turkey. The Hagia Sophia originally built as a Christian church by Roman Emperor Justinian I in Constantinople (aka Istanbul).
The Galata Tower — called Christea Turris by the Genoese — is a medieval stone tower in the Galata/Karaköy quarter of Istanbul, Turkey, just to the north of the Golden Horn's junction with the Bosphorus.
Saint Petersburg Mosque, Russia - Quote:"The walls were made with grey granite and the dome and both minarets (tower) are covered with mosaic ceramics of sky-light-blue colour. Skilled craftsmen from Central Asia took part working on the mosque.