There's been some modern refurbishment and thru the ages,.....back in the day they were real craftsmen built things to last a millennium and then some.
All in all its faired quite well considering it was a focus point in the war of the roses that lasted for 100 years. The place had been under numerous attacks and set on fire but it survived.
Good to preserve history, that one is in great shape. Fun to see history from 1,000 years ago still standing.
We saw some of that in Germany this summer, a lot of the preservation work had been done in the 1800s since the French burned/destroyed a lot of the castles, etc. in the 1600s. The Germans still seemed somewhat upset about it, but they had gotten over it. Mostly.