Similar rings feature in the 14th century medieval romance Sir Eglamour of Artois and the 12th century Floris and Blancheflour, and in Thomas Malory's Tale of Sir Gareth of Orkney, in his 15th century epic Le Morte d'Arthur, in which Gareth is given a ring by a damsel who lives in Avalon that will render him invulnerable to losing any blood at a tournament.
