Hagia Irene, also known as Saint Irene, is a Greek Eastern Orthodox church located in the outer courtyard of Topkapi Palace in Istanbul.

The Hagia Sophia is a grand structure with a dome that appears to be miraculously suspended in the air.

The Church of the Virgin of the Pharos is a Byzantine-era chapel inside the Great Palace of Constantinople.

Little Hagia Sophia, originally known as the Church of the Saints Sergius and Bacchus, is a former Eastern Orthodox church dedicated to Saints Sergius and Bacchus in Constantinople.

The Karaköy Aya Nikola Church, located in Beyoğlu district, is an Eastern Orthodox church.

The Surp Pirgiç Catholic Church is an iconic Catholic church located in Beyoğlu, Istanbul.

The Church of Saint Benoit is a prominent Catholic church building located in Istanbul.