The National Trust in England is going to educate visitors to its old buildings about how they are linked to slavery or conquest.

The country houses and castles of the National Trust are interesting to visit, and worth preserving, because they were built lavishly &mash; by rich people. They surely got their riches by exploiting someone. If it wasn't slaves from Africa, or the natives of conquered territory, it must have been British people.

When we appreciate those buildings we should keep in mind why they exist.