Kırklareli Province (Turkish: Kırklareli ili) is a province in northwestern Turkey on the west coast of the Black Sea. The province neighbours Bulgaria to the north along a 180 kilometers long border. It borders the province of Edirne to the west and the province of Tekirdağ to the south and province of Istanbul to the southeast. Kırklareli is the capital city of the province. The province's and its central city's name means "the land of the forties" in Turkish and it may refer either to the forty Ottoman ghazis sent by the sultan Murad I to conquer the city for the Ottoman Empire in the 15th century or to the forty churches reported to be situated in the region before the Ottoman conquest, as attested by the former name of Kırklareli (Kırk Kilise in Turkish; Σαράντα Εκκλησιές, Saranta Eklesies in Greek).