The Selimiye Mosque is an Ottoman imperial mosque, located in the city of Edirne, Turkey. It was commissioned by Sultan Selim II and was built by the imperial architect Mimar Sinan between 1568 and 1575. It was considered by Sinan to be his masterpiece and is one of the highest achievements of Islamic architecture as a whole and Ottoman architecture in particular. The mosque, together with its külliye, was included on UNESCO's World Heritage List in 2011.