Order of St. JohnOrder of St. John Full size medal Unmounted with 15cm ribbon as required for swing mounting. Miniature size medal Unmounted with 10cm ribbon as required for swing mounting. The Order of St John,[3] short for Most Venerable Order of the Hospital of Saint John of Jerusalem (French: l'ordre trs vnrable de l'Hpital de Saint Jean de Jrusalem)[n 1] and also known as St John International,[4] is a British royal order of chivalry constituted in 1888 by royal