William FitzOsbern, 1st Earl of Hereford, Lord of Breteuil, was a relative and close counsellor of William the Conqueror and one of the great magnates of early Norman England. FitzOsbern was created Earl of Hereford in 1067, one of the first peerage titles in the English peerage. He is one of the very few proven companions of William the Conqueror known to have fought at the Battle of Hastings in 1066. His chief residence was Carisbrooke Castle on the Isle of Wight, one of many castles he built in England.

Snodhill Castle is a ruined motte-and-bailey castle, about 1 mi (1.6 km) south of the village of Dorstone in west Herefordshire, England. It is recognized as one of the major castles of the Welsh Marches. It was built in the 11th century to secure the border between Norman England and the Welsh Princes. Archaeological excavations show that it was one of the first Norman castles in England to have stone-built fortifications, with more sophisticated defenses being added in later centuries.