Haseki Sultan was a title given to the chief consort of an Ottoman Sultan, particularly during the reign of Suleiman the Magnificent. The term "Haseki" translates to "favorite" or "beloved," indicating her special status within the royal harem. One of the most notable Haseki Sultans was Hurrem Sultan, who played a significant role in the political and cultural life of the Ottoman Empire. She was known for her intelligence, influence, and contributions to architecture, including the construction of Suleymaniye Mosque in Istanbul.