Penrhyn Castle is a country house in Llandygai, Bangor, Gwynedd, North Wales, in the form of a Norman castle. It was originally a medieval fortified manor house, founded by Ednyfed Fychan.

Hastings Castle
Immediately after landing in England in 1066, William of Normandy ordered three fortifications to be built, Pevensey Castle in September 1066 (re-using the Roman Saxon Shore fort of Anderitum), Hastings (prior to the Battle of Hastings), and Dover. Hastings Castle was originally built as a