Saint Casian Cave, Constanta district, Romania, Europe. The cave opens in the right lime terrace of Casimcea, about 3 km south-west from the village of Cheia and about 4 km north-west from the village of Casian. St John Cassian (Sfantul Ioan Casian) was born in the south of Romania, in a region that had been visited by the Apostle Andrew, in about 360 AD. Hidden from sight, through the rough forms of the Hill of St. John Cassian, the cave opens into a rocky wall, above the valley of Casimcea. A narrow path, with steps carved in limestone, arranged recently, is leading to the entrance of the cave. The cave is spacious and without the usual moisture.