Church of St. Peter and Paul is the oldest and most mysterious old mountain cave church of the 13th century, on Kalik hill near the village of Rsovci, about 22 km from Pirot. Unique in the Christian world, the fresco of Jesus the Bride, most likely from the 13th century, depicts Jesus as a bald young man in Buddhist attire and in an octagonal mandorla or star. It is alleged to have been painted by Sinai expatriates who fled to Sinai as a result of the Ottoman attacks. At that time, the hermitages as temples were not subject to episcopal canons, so it is believed that the figure of Jesus was drawn on the rock by the hermitages from the Cave Church. Due to its specificity, the church has been protected as a national cultural property since 1981.