A lot of people might want to take that gold from you. And so one of the services that the Knights Templar developed was that you could go to their temple in London, essentially deposit your money, they'll give you a note of credit saying that we, the Knights, owe you a certain amount of money, and then you make your journey, and when you get to Jerusalem, you can give that note to the Knights there, and they will give you your money. Now this is something that we take for granted today. I can go to an ATM machine anywhere in the world, and for the most part, I can put in my ATM card and get access to money. But there's a lot of infrastructure that makes that happen. Today we have telecommunications, we have satellites that help information go back and forth, we have servers that keep track of all of that data. They didn't have that in the Middle Ages.