Art Nouveau genius Hector Guimard built this unique synagogue (also called Synagogue de la Rue Pavée) in 1913 for a Polish-Russian Orthodox association. The facade resembles an open book: Guimard used the motif of the Ten Commandments to inspire the building's shape and its interior, which can only rarely be visited. Knock on the door and see if the caretaker will let you upstairs to the balcony, where you can admire Guimard's well-preserved decor. Like other Parisian synagogues, the front door of this address was dynamited by Nazis on Yom Kippur, 1941. The Star of David over the door was added after the building was restored.
10 rue Pavé, Paris, 75004, France