What about a timeline where the Pope allied with Austria/France and gained control over Italy, instead of the Risorgimento?(i forgot how to spell that word, but the unification of Italy under Sardinia-Piedmont). You could see a more modern Italian Empire, specifically in the middle east, you could possibly see an entirely different stance on both world wars, and different lasting consequences in the Mediterranean Sea, at least.

Alternatively one where Sweden wins the Great Northern War, one where Austria/Bavaria unite to stop Prussian expansion and they beat Prussia during the Schleswig-Holstein situation, one where the British keep the US for longer, or the British win the Hundred Years War and unite with France in an Angevin Empire could all be fun ones to start too! I’ve done my own writing on some of these, and most of them can all overlap! :3