Historical settings

In plotting my newest books, I wondered if setting it in Napoleon's Paris would work. The only Regency romances I've read that take place in France involve the English as spies working against Napoleon. I eventually decided against it, for now at least, but wondered...

Is that too unusual a setting? Is that something most Regency readers won't read?

I've been doing a lot of reading over at the Unusual Historicals blog so naturally I'm all about different settings, but is this one too different?