Built in 1407 and reputed to be the oldest house in Paris (though other buildings claim that title), this abode has a mystical history. Harry Potter fans should take note: this was the real-life residence of Nicolas Flamel, the alchemist whose sorcerer's stone is the source of immortality in the popular book series. A wealthy scribe, merchant, and dabbler in the mystical arts, Flamel willed his home to the city as a dormitory for the poor, on the condition that boarders pray daily for his soul. Today, the building contains apartments and a restaurant.
51 rue Montmorency, Paris, 75003, France