Ljubljana was allegedly founded by the Greek hero Jason and the Argonauts after defeating a monster living in a large lake near the source of the Ljubljanica River. According to legend, Jason and the Argonauts had stolen the golden fleece and fled across the Black Sea and several rivers to this lake, where they disassembled their ship to carry it over land to the Adriatic Sea. The monster Jason killed there is now depicted on Ljubljana's coat of arms as the Ljubljana Dragon.