For Notre-Dame, as a French who spent a lot of time in Paris, I always thought Notre-Dame de Paris was cool and neat, sure, but to qualify it as a Wonder... It's a long shot. We have many more beautiful and impressive gothic cathedrals to have to put Notre-Dame de Paris (also, you have to precise Notre-Dame because it means Our Lady and there is A LOT of churches called Our Lady of Something), and the cathedral has her Flower Window (don't remember the english term) for her but I think that's all. I mean, St Peter's Basilica would make more sense because 1) biggest church in the world and 2) center of Christianism, making it a true wonder by its size, its beauty and its historical meaning.