Who hasn't seen that one, it's been in my own favourites since she posted it. It's kind of impossible to not put Belle in the 1700s since that's the most prevalent period in the film's design. I started my princesses inspired by a series of postcards my sister brought from Versailles.
And nah, I doubt I'll ever do a historically "accurate" princess series as such, so many have been done already that I don't think I could add anything new to it. I will however continue to occasionally put the princesses in historical settings when I feel like it.