The Custom House, Lancaster Quay, built in 1765 and restored as Lancaster Maritime Museum in 1985.
The building has played a role in Lancaster's slave trade history, both as the place where merchants taxes would have been paid during that period, and today as a place where those links are presented for discussion.
NOTE: I'm on hols until Wed and having probs uploading pics, so unless I can get it sorted there will be a short hiatus on the blog.