土耳其 伊斯坦堡 Turkey Istanbul ; 聖蘇菲亞大教堂 Aya Sophia , Hagia Sophia ; 藍色清真寺 Sultan Ahmet Camii , Sultanahmet Mosque , Blue Mosque .

Across from Hagia Sophia stands the supremely elegant Imperial Sultanahmet Mosque with six minarets . Built between 1609 and 1616 by the architect Mehmet, the building is more familiarly known as the Blue Mosque .

When the Hagia Sophia was used as a place of worship, both for Christians and then for Muslims, the focus of the building was the east end, directly across from the entrance. This is because christian churches are traditionally oriented towards the east, and Muslims always pray facing Mecca, which is east of Istanbul. Thus the bulk of interesting sights are clustered in this area of the Hagia Sophia ‘s huge nave.