I've read that in ancient Rome, bronze tools were used for carving stone; I assume this was true in ancient Greece as well. What did the Egyptians use? I once read that the great obelisks were tapped out of the surrounding stone using nothing more that pieces of a harder stone. What about the great blocks for the pyramids and Temple of Luxor? What tools did they use to carve those intricate bas-reliefs on the walls?