The grounds of Prittlewell Priory, a museum and park in Southend-on-Sea in Britain, about 40 miles east of London, feature gardens, buildings and exhibits depicting what life was like there centuries ago.

In online reviews, visitors praised the site for being attractive and inviting.

For one family, though, it might have been a bit too inviting.

An 800-year-old sandstone coffin was damaged on Sunday after the family put a child into it for a photo and knocked off a small piece, museum officials said in a statement.

Closed-circuit television cameras were recording in the museum, but did not clearly capture what happened, the statement said. The family left without reporting the damage, according to news reports, but it was discovered later.