In the Grande Synagogue, 13, quai Tilsitt,
where you can clearly see the Magen David in the window at the top:
I was surprised to see an organ built into the wall in the back, above the congregation:
Whether or not a synagogue could have an organ was a touchstone of one of the primary debates between the Refomers of the 19th century. From all other appearances, this synagogue (which was built in 1864) has all the earmarks of an orthodox synagogue. And yet, there's that organ.