The Süleymaniye Mosque 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, although work on the complex probably continued for a few years after this.

Suleiman I, commonly known as Suleiman the Magnificent in Western Europe and Suleiman the Lawgiver in his Ottoman realm, was the longest-reigning sultan of the Ottoman Empire from 1520 until his death in 1566. Under his administration, the Ottoman Empire ruled over at least 25 million people.