The Monastery of Saint John of Rila, also known as Rila Monastery ("Sveti Ivan Rilski", is the largest and most famous Eastern Orthodox monastery in Bulgaria. It is situated in the southwestern Rila Mountains, 117 km south of the capital Sofia in the deep valley of the Rilska River at an elevation of 1,147 m above sea level, inside of Rila Monastery Nature Park. The monastery is named after its founder, the hermit Saint Ivan of Rila, and houses around 60 monks. The monastery is a popular pilgrimage site for many Orthodox Christians.

Rila is the highest mountain range of Bulgaria, the Balkan Peninsula and Southeast Europe. It is situated in southwestern Bulgaria and forms part of the Rila–Rhodope Massif. The highest summit is Musala at an elevation of 2,925 m which makes Rila the sixth highest mountain range in Europe after the Caucasus, the Alps, Sierra Nevada, the Pyrenees and Mount Etna, and the highest one between the Alps and the Caucasus. It spans a territory of 2,629 km2 with an average elevation of 1487 m. The mountain is believed to have been named after the river of the same name, which comes from the Old Bulgarian verb "рыти" meaning "to grub".