Sweetheart Abbey (Gd: An Abaid Ur), 8 miles (13 km) south of Dumfries, near to the Nith in south-west Scotland, was a Cistercian monastery, founded in 1275 by Dervorguilla of Galloway, daughter of Alan, Lord of Galloway, in memory of her husband John de Balliol. His embalmed heart, in a casket of ivory and silver, was buried alongside her when she died; the monks at the Abbey then renamed the Abbey in tribute to her. Their son, also John, became king of Scotland but his reign was tragic and short. The depredations suffered by the Abbey in subsequent periods, have caused both the graves to be lost. The abbey, built in deep-red, local sandstone, was founded as a daughter house to Dundrennan Abbey; this Novum Monasterium (New Monastery), became known as the New Abbey.