Aya Sofya
Haghia Sophia (Divine Wisdom), also known as Megale Ekklesia (The Great Church). As a Greek Orthodox cathedral until 1204 when it became Roman Catholic.
Blue Mosque
The Blue Mosque is one of the most prominent landmarks of Istanbul, especially when viewed from the First Hill or from the Asian shore of the Sea of Marmara.
Hippodrome
Byzantine Hippodrome was the heart of Constantinople's political and sporting life, and the scene of games and riots through 500 years of Ottoman history as well.
Yerebatan Sarnici
This huge cistern, began to be called by the public 'the Sinking Palace' – and not without a reason, seeing the great number of marble columns arising out of the water.