The Sultan Ahmed Mosque is an historical mosque in Istanbul, the largest city in Turkey and the capital of the Ottoman Empire (from 1453 to 1923). The mosque is popularly known as the Blue Mosque for the blue tiles adorning the walls of its interior.
It was built from 1609 to 1616, during the rule of Ahmed I. Like many other mosques, it also comprises a tomb of the founder, a madrasah and a hospice
The capital of the Ottoman Empire is represented by its most important monuments: Topkapı Saray and the Blue Mosque in the archaeological zone; the Sehzade and Süleymaniye mosques, which are two of the architect Koça Sinan’s major works, constructed under Süleyman the Magnificent (1520-66) in the Süleymaniye quarter; and the vernacular settlement vestiges of this quarter (525 wooden houses which are listed and protected).
The Blue Mosque is part of UNESCO world heritage sites.