Bangor-on-Dee (Welsh: Bangor-is-y-coed or standardised Bangor Is-coed[2]) is a village and community in Wrexham County Borough, Wales, on the banks of the River Dee.

[4] 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, which probably took place near Bangor-on-Dee; a number of the monks then transferred to Bardsey Island and appear among lists of saints.

[5] Before the battle, monks from the monastery had fasted for three days and then climbed a hill to witness the fight and pray for the success of the Welsh; they were massacred on the orders of Æthelfrith.

[5] More than a millennium later, the massacre was recounted in a poem entitled "The Monks of Bangor's March" by Walter Scott, and put to music by Ludwig van Beethoven.

[10] Bangor had a station on the Cambrian Railways' Wrexham to Ellesmere line which crossed the River Dee via an iron bridge to the north of the village.