Can you name all the countries of Europe in 1337, the year the Hundred Years' War started in Western Europe, according to the video game Europa Universalis V?
While not perfect, this is probably a very decent list. The makers of the game performed research and consulted historians.
The Holy Roman Empire is outlined in red
Unguessed small countries can be shown using "Show Missing Countries"
The HRE statelets are mindnumbing! :-)
Some of the Welsh marcher lordships could do with some variations in spelling