Is Cinderella sets in Belgium?

No, But I Think You Are Very Close. I Think I Saw In An Article That Cinderella Is Considered An Italian Princess But Charles Perrault Who Wrote The Book In 1697 Had The Setting In France!

a) The architecture is French.

b) The clothes are French.

c) The version of Cinderella it's based on is French.

d) Some names sound very French (ie: Jaq, which sounds like short for Jacques, which is the French form of Jacob- this seems like a reliable piece of evidence since Cinderella gave the mice fancy names and then nicknamed them, like Gus, who's real name is Gustav I believe.)

And Cinderella doesn't wear a cloak, so I say France.