He was flayed alive in a cave near Celaenae for his hubris to challenge a god. Apollo then nailed Marsyas' skin to a pine tree, near Lake Aulocrene ("Karakuyu Gölü" in modern Turkey), which Strabo noted was full of the reeds from which the pipes were fashioned. Diodorus Siculus felt that Apollo must have repented this "excessive" deed, and said that he had laid aside his lyre for a while, but Karl Kerenyi observes of the flaying of Marsyas' "shaggy hide: a penalty which will not seem especially cruel if one assumes that Marsyas' animal guise was merely a masquerade." Classical Greeks were unaware of such shamanistic overtones, and the Flaying of Marsyas became a theme for painting and sculpture. His brothers, nymphs, gods and goddesses mourned his death, and their tears, according to Ovid's "Metamorphoses", were the source of the river Marsyas in Phrygia /(it's called Çine Creek today), which joins the Meander near Celaenae, where Herodotus reported that the flayed skin of Marsyas was still to be seen, and Ptolemy Hephaestion recorded a "festival of Apollo, where the skins of all those victims one has flayed are offered to the god." Plato was of the opinion that it had been made into a wineskin.