The time period is the most mangled and confused mess I have ever seen. It combines elements of the 6th century through the 18th century. And some things never existed. There was never a castle design like that of King Uther. And nuns never lived in what looks like a Georgian Manor house. And corks for bottles weren't invented until the late 17th century. And the ships depicted didn't appear until the 16th century. And by the late 9th century King Alfred the Great had vanquished the Vikings and was King of England. The whole timeline is on bloody mess.