Which empire was the Castellum of Godrici located?
Godric of Mappestone:  Victorian historians, however, believed the castle to date back further to the pre-Norman conquest days of King Canute, and the site may have been among a small number of Saxon fortifications along the Welsh border. Cnut the Great: Cnut the Great (Old Norse: "Knútr inn ríki"; c. 995 – 12 November 1035), also known as Canute - whose father was Sweyn Forkbeard (which gave him the patronym "Sweynsson", Old Norse: "Sveinsson") - was King of Denmark, England and Norway; together often referred to as the North Sea Empire.
i don't know