The Fatih Mosque (, "Conqueror's Mosque" in English) is an Ottoman mosque in the Fatih district of Istanbul, Turkey. The original mosque on the site was constructed between 1463 and 1470 on the site of the Church of the Holy Apostles. It was seriously damaged in the 1766 earthquake and was rebuilt in 1771 to a different design. It is one of the largest examples of Ottoman-Islamic architecture in Istanbul and represents an important stage in the development of classic Ottoman architecture. It is named after Ottoman sultan Mehmed the Conqueror, known in Turkish as "Fatih Sultan Mehmed", the Ottoman sultan who conquered Constantinople in 1453.