Castles have played an important military, economic and social role in Great Britain and Ireland since their introduction following the Norman invasion of England in 1066. Although a small number of castles had been built in England in the 1050s, the Normans began to build motte and bailey and ringworks castles in large numbers to control their newly occupied territories in England and the Welsh Marches.1 Caernarfon Castle Caernarfon Castle (Welsh: Castell Caernarfon) is a medieval fortress in Caernarfon, Gwynedd, north-west Wales. There was a motte-and-bailey castle in the town of Caernarfon from the late 11th century until 1283 when...