Many parts of the granite statues were found, the most important of which had features close to Ramses II. The statue needs some restoration and weighs between four and five tons.
People used to think we just faked all that stuff... it was all written, rehearsed. The fact that it looks as cobbled together as it does is just that we weren't very good.
I do not think that music keeps evolving. It evolved through Bach; since then, in my humble opinion, all the innovations added nothing.