From what I’ve read about 19th Century art training, students used to spend a good deal of time making copies of the old masters. I don’t know how many art schools these days are encouraging the practice, but I think it’s a great idea. It forces you to appreciate in a much deeper way what your heroes were actually doing.
I made these copies from reproductions of some of my favorite academic painters, Hudson River School artists, and golden age illustrators. They’re all in oil, mostly about 6 or 8 inches across. I’ve never had the nerve to set up and do a copy in a museum, but I salute those who have.