Art Nouveau Synagogue Le Marais, Ménilmontant & Belleville

At the heart of the Jewish quarter of Pletzl lies this art nouveau synagogue, designed in 1913 by Hector Guimard, who was also responsible for the city's famous metro entrances; this was his only religious building. It was completed in 1914 and extensively restored following damage during dynamite attacks in WWII. The interior is open to members only.