 After the Christianization of Kievan Rus, this place became a monastery, which, quite remarkably, continued to bear the name of Perun.Perun is not mentioned directly in any of the records of Western Slavic traditional religion, but a reference to him is perhaps made in a short note in Helmold's Chronica Slavorum, written in the latter half of the 12th century, which states (quite similarly to Procopius some six centuries earlier) that Slavic tribes, even though they worship many various gods, all agree there is a supreme god in heaven which rules over all other on earth.This could be a reference to Perun, but since he is not named, nor any of his chief attributes (thunder or lightning) mentioned, we cannot be certain.