Do we need timed tickets to the Louvre, St Chapelle and the Orangerie Museum or other sights if we have the museum or Paris city pass?
You need timed tickets to all 3 you mentioned - it’s very easy to do online. I believe if you look online for museum pass it highlights what locations need timed tickets and what don’t. I went to the Louvre and St Chappell just few weeks ago, they only cared about the actual time at the Louvre
I've gone to St Chapelle as a walk-up and never had any problems. But maybe it wasn't busy the times I was there.
We had to have them for the St Chapelle last Sep. The concierge got them for us..