Newcastle's Norman castle keep has become a victim of the summer deluges. It's thought rainwater found its way into the building during the two huge storms of June and August.
The water brought down a Georgian plaster ceiling in the keep's lower hall.
Specialist workers have been removing the remains of the ceiling and cleaning up the wooden joists which have now been exposed.
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Harry was world rowing champion who drew thousands to the banks of the River Tyne in the 1850s.