L'Expo des 150, a street-art exhibition organized for the temporary opening of the Cabaret du Chat Noir, runs until March 30, 2025, in the 9th arrondissement of Paris. The event brings together some 350 contemporary artists in an 8,000 m2 former telephone exchange. The exhibition takes over the first two floors, covering 3,000 m2. And best of all, it's free with registration!