So, what can you bring with you to Notre Dame? You can bring small bags, like purses or tote bags, as long as they're not too big. You can also bring water bottles and snacks, which is great news if you're planning a long day of sightseeing.
Notre Dame to implement clear bag policy at stadium, arenas : r/CFB
But, what about large backpacks or luggage? Unfortunately, those are not allowed inside the cathedral. It's like trying to bring a big suitcase onto a plane - it's just not going to fit, and it's not safe.
And, let's not forget about prohibited items, like drone cameras or tripods. Those are not allowed inside Notre Dame, and it's easy to see why. You wouldn't want someone flying a drone around the cathedral, right? It's just common sense.