Originally, on Kláštorisko glade was a monastery settlement and a small hillfort referred in the documents as castrum Lethon. During the Mongol invasion in 1241, it was a shelter for the inhabitants of the surrounding villages, hence the name Lapis Refugii, or “Rock of Refuge”. Later, the hillfort was taken over by the Carthusian monks, who built their monastery there around 1307. In the fifteenth century, it was destroyed by the Hussites, but managed to rebuild it. The location of the monastery, away from other human settlements, meant that this facility was falling victim to robberies from time to time. Finally, in July 1543, at the request of the episcopal authorities from the Spišská Kapitula, the monastery was destroyed and the monks moved to the Red Monastery, where they also had their seat, and the abandoned buildings fell into disrepair.
The southern part of the monastery kept a typical Benedictine scheme. There was a single-nave church with a polygonal presbytery and a southern sacristy, a chapel, a prior house, a refectory and an oblong building with a monastery kitchen and a library. On the north side there was a large courtyard with dimensions of 40 x 40 meters surrounded by Carthusian hermits, each of them had a size of 10 x 10 meters. There were a total of nine, separated from each other by gardens with a shape similar to a square. The entrance gate to the monastery was situated on the north side.
Website apsida.sk, Letanovce-Kláštorisko.
Website wikipedia.org, Kláštorisko.