They didn't have that in the Middle Ages. And so you can imagine this is a very powerful idea, that I could deposit money one place, and then I could withdraw it someplace else. And we still don't fully understand how the Knights were able to pull this off. It requires a lot of trust, and how were they able to authenticate the notes of credit at any of these points? Now not only did they do this type of deposit and withdrawal in multiple locations, they also, because they had all of these deposits, and people were also donating money to them just to support their cause, they were able to provide loans, oftentimes loans to very powerful individuals like kings and nobility. They were often brokers in major transactions. This is the reason why historians really do consider them perhaps the first true international bank.