Belgium is a state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, as well as those of several other major international organizations such as NATO.
Belgium is a federal state comprising three communities, three regions, and four language areas. For each of these subdivision types, the sum of their circumscribed surfaces composes the entire country; in other words, the types overlap.
No doubt, if you're traveling to Brussels, you'll want to know what the Belgium currency is. Quite simply, it's the Euro and quite easy to make the switch from dollars, pounds and other international currencies.