Question: what is open on labour day in paris?
Answer: Notre Dame – Open.
The Louvre – Closed.
The Eiffel Tower – Open.
Musée d'Orsay – Closed.
Arc de Triomphe – Closed (But you could still take photos from the outside.)
The Centre Pompidou – Closed.
Sacré-Cœur – Open.
Père Lachaise Cemetery – Open.