History Fair topic relating to monarchy...?

I'm a freshman in high school and I have to do a History Fair project on anything I choose. I am really interested in the English and French monarchies. Some topics I've asked about but my teacher says I can't do because they're too broad are the House of Tudor, War of the Roses, the French Revolution, and I can't do Marie Antoinette my favorite person in history because somebody else in my cl is. Any ideas? I could really use the help. And it doesn't necessarily have to be monarchy but I really like studying that. Thank you!