Complex sentence: Guldholm was abandoned (Danish: "nedlagt") and the monks who didn't run away went north to the banks of Flensborg Fjord near the little hamlet of Ryd and began work on a new Cistercian house, Ryd Abbey in 1210.
Split into simpler sentences: Guldholm was abandoned (Danish: nedlagt) and the monks who didn't run away, went north to the banks of Flensborg Fjord near the little hamlet of Ryde. There they began work on a new Cistercian house, Ryd Abbey in 1210.