The EU has its own denomination, to help the nations convert and trade easier: the Euro. It is a rounded E (as in element of) with two bars. There is an HTML code, but I don't remember what it is.

I didn't realize that any member was going to stop minting its own money in favor of the Euro.

Anyway... there are some American Presidental coins floating around. I think they are US$20 demoninations, but... they are backed by the bank of Liberia, they are not US currency.

***?