Haseki Sultan Complex (also Hürrem Sultan Complex) is a 16th-century Ottoman imperial mosque complex. Hürrem Sultan , also known as Roxelana , was the chief consort and legal wife of the Ottoman Sultan Suleiman the Magnificent. She commissioned a bath, the Hurrem Sultan Bathhouse, to serve the community of worshippers in the nearby Hagia Sophia. The Haseki Sultan Mosque designed by famous architect Mimar Sinan was built in 1539