Okay I'll play. I've only read the original post, so let's see how bad I am.
a) What is the capital city of Denmark?
- Cophenhagan
b) what is the difference between Holland and the Netherlands
- Oh geez, isn't the Netherlands the political name of the country including all territory while Holland is the name of the home country? Something like that, right?
c) How old is Belgium
- Don't know exactly. I don't think it's that old. Wasn't it was created as a buffer state between France and Holland because of religious wars? I seem to remember an ongoing dispute about what language to say Mass in. So I'm going to guess 300 years.
d) Which european countries are a kingdom and which of them are an United Kingdom?
- Well I'm not sure if you're including the U.K. (Britain) in this, but I'll throw out Sweden, Monaco Denmark as kingdoms and the Netherlands and Britain as united kingdom. Does Vatican City count as a kingdom, or a papal territory?