Beginning as a Celtic romance and ending up a beloved medieval tale, the story of Tristan and Isolde has many different versions. All agree that Tristan was a Cornish knight and Isolde an Irish princess. Although Tristan was supposed to bring her back for King Mark to marry, Isolde and Tristan accidentally ingested a love potion on the way and fell deeply under its spell. Isolde still married the king, but her relationship with Tristan continued. Eventually, King Mark found out about the affair and the lovers ran away. However, they were caught and to escape punishment by death and save the woman he loved, Tristan agreed to leave the country and eventually ended up in Brittany, where he married Isolde of the White Hands.