Petar Koriški (in Serbian: Петар Коришки; lived in the 13th century) was the first hermit saint of Medieval Kingdom of Serbia, who lived in a cave on Rusenica mountain, part of the Šar Mountains range, where he gained fame as an ascetic wonderworker among his people.
[1] The Serbian Orthodox Church now venerates him on 5 June (Julian Calendar).
He was born in Ujmir, a village south-west of Peja and died in Koriša, which is located in Kosovo.
Petar and his sister, after the death of their parents, joined a monastic community and later both became hermits.
Petar Koriški was the only saint that was neither a state ruler nor head of the Church, though an exception was made in his case by the Serbian Orthodox Church.