The Süleymaniye Mosque (Turkish: Süleymaniye Camii, pronounced [sylejˈmaːnije]) is an Ottoman imperial mosque located on the Third Hill of Istanbul, Turkey. The mosque was commissioned by Suleiman the Magnificent and designed by the imperial architect Mimar Sinan. An inscription specifies the foundation date as 1550 and the inauguration date as 1557.built by the legendary architect, Mimar Sinan, it is known as one of his masterpieces, and his largest design.t took eight years to build Suleyman was the longest-reigning sultan of the Ottoman Empire (1520-1566) and is regarded by some as a “Second Solomon” because of the harmony and justice under his rule.