The Pyramids were originally cased in a layer of white limestone. Almost all of that is gone, since, if I recall, they were small enough that they could be car

The Pyramids were originally cased in a layer of white limestone. Almost all of that is gone, since, if I recall, they were small enough that they could be carted away, unlike the granite that remains. Monumental buildings almost always end up being wholesale building supply once they aren't revered and maintained.