Prehistoric megalithic sanctuary near the village of Liliach (Nevestino municipality)in the "Monastery" area, The local population calls the megalithic complex Proviralkyata. It is assumed that the cult site arose in the Eneolithic period, and was subsequently inherited as a sacred territory by the Thracian tribe of Peoni, where fertility rituals were held. It is possible that there were also rituals with sacrifices in the name of the goddess Mother. The site is large-scale, with parts of it falling underground on the surrounding terrain. Perhaps if excavations are carried out, something more interesting can be discovered. The inhabitants of the village of Liliach hold the belief that the "Proviralkyata" is an extraordinary place that possesses strong life-giving energy and, according to legend, Theodora, the wife of Emperor Justinian I, conceived thanks to the ritual performed under the rock. It is believed that if a barren woman passes through the "Proviralkyata", she is healed and can soon have children. About 1 m away from the tunnel formed between two rocks, which leads to the so-called "proviralka", a small chapel with the patron saint of the Holy Virgin Mary was built in a natural shallow cave, and immediately above it was built the village church "St. George the Victorious". Here every year on St. George's Day, the locals make a sacrifice for health. Every year at the traditional village fair, which is held on May 5, on the eve of the temple holiday.