The Inkerman Monastery of St. Clement is a cave monastery in a cliff rising near the mouth of the Black River, in the city of Inkerman, administered as part of the sea port of Sevastopol. It was founded in 1850 on the site of a medieval Byzantine monastery where the relics of St. Clement were supposedly kept before their removal to San Clemente by Saints Cyril and Methodius. The early Christians are supposed to have kept the relics in a grotto which could be visited only on the anniversary of his death. William Rubruck described it as a church "built by the hands of angels".