@darylo Thanks, Daryl! This is a museum, but it didn't look as though it had been opened for awhile. Peeling paint, ratty curtains, etc. Wish I could have gone inside!!! ;)
@juliedduncan I think that was about a dozen layers or so. The fun part was finding the right opacity and shading for the ghosts to seem to be in the same light. Hmm, now I have to figure out what will be going on in the photo. I'm thinking something like women's suffrage ? Or the women's abolition movement?