sentences: "Bangor" is an old Welsh word for a wattled enclosure,
  
  A monastery was established at Bangor-on-Dee in about AD 560 by Saint Dunod (or Dunawd) and was an important religious center in the 5th and 6th centuries.The monastery was destroyed in about 613 by the Anglo-Saxon king Æthelfrith of Northumbria after he defeated the Welsh armies at the Battle of Chester; a number of the monks then transferred to Bardsey Island.