And in fact, their command to even have to touch that black rock that we talked about before. So now that he has passed on, the empire is not going to stop at that point. We're going to have what are called caliphates, which are going to be basically little dynasties of rulers. And there is actually a split in Islam between people who call themselves Sunnis and people who call themselves Shiites. Sunnis believe that the first caliphate was ruled under by his father-in-law, Muhammad's father-in-law, Abu Bakr. People that are Shiites believe that it's not really until the fourth caliphate that we get the real ruler, which was his son-in-law, Ali. But we could talk about that a little bit later.