Caerhun
Caerhun (English: Fort of Rhun) is the site of the 2nd century minor Roman fort of Canovium, situated along the Roman road between the larger Roman forts of Deva (at modern Chester) and Segontium (near modern Caernarfon). It is supposed to have been one of Rhun's strongholds, and while definitive evidence of this is lacking, it is circumstantially supported by archeological research and the antiquity of the name Caerhun. Furthermore, it guards an important crossing of the River Conwy at Tal-y-Cafn which leads to the pass at Bwlch-y-Ddeufaen, an entrance to Eryri (English: Snowdonia), the defensive heartland of the Kingdom of Gwynedd. Its military significance would certainly have been noticed by both defenders and potential aggressors.
Read more about this topic: Rhun Hir Ap Maelgwn