The quadrivium would be extra, but the more I read, the more I've seen that people are on their own if they want an actual, factual liberal arts education. Learning little shards of extremely specific facts and particular fads in theory do not constitute a liberal arts education in my book.
Wait -- maybe there's one. Now that's what I call a classical education. Man, I wish they had a correspondence course for adults. I think I will contact them about that.