 And there was really no Christian Hellenic civilization left. And there isn't really today either. And then finally, I looked at Hernan Cortes' storming of what is now Mexico City, the Aztec city of Tenochtitlan. It was also impenetrable. It was like a Venice on a lake. Empire of four million people. And he destroyed it within two years, never with more than 1,500 conquistadors.