The Monastery of Saint Ivan of Rila, better known as the Rila Monastery (, Rilski manastir) is the largest and most famous Eastern Orthodox monastery in Bulgaria. It is situated in the southwestern Rila Mountains, south of the capital Sofia in the deep valley of the Rilska River (Rila River) at an elevation of above sea level, inside of Rila Monastery Nature Park. The monastery is named after its founder, the hermit Ivan of Rila (876 - 946 AD), and houses around 60 monks.