Koca Mi'mâr Sinân Âgâ (, "Sinan Agha the Grand Architect"; Modern Turkish: Mimar Sinan, , "Sinan the Architect") ( 1489/1490 – July 17, 1588) was the chief Ottoman architect and civil engineer for sultans Suleiman the Magnificent, Selim II, and Murad III. He was responsible for the construction of more than 300 major structures and other more modest projects, such as schools. His apprentices would later design the Sultan Ahmed Mosque in Istanbul, Stari Most in Mostar, and help design the Taj Mahal in the Mughal Empire.