But the most important lesson is that in order to do all of that, you can just imagine the advanced governmental systems that had to be in place to run a job that big. So make sure that you get the pharaohs and of course the big idea of the pyramids as we move on and we take a look at the religious life of an ancient Egyptian living in the Old Kingdom. I'm going to go get that right now. So like Mesopotamia, and perhaps because of Mesopotamia, you have to remember that the Egyptians are in contact with Mesopotamia. Mesopotamians invented sails and such, are also going to be polytheistic. They're going to believe in many gods. But the one differentiation is going to be that they believe in an afterlife.