Rouen Museum of Fine Arts - Meeting of Metropolitan Museums (RMM)

"The jewel in Rouen’s crown, this impressive museum is home to France’s largest Impressionist collection outside of Paris. Here, you’ll find three stunning works from Monet’s famous Rouen Cathedral series, along with other highlights like a rare Caravaggio and paintings by everyone from Rubens, Vélazquez, and Fragonard to Delacroix, Modigliani, and Duchamp. After exploring the collection, stop into the small but pleasant bookstore for a souvenir, then take a stroll in the lovely park next door. Admission to the permanent collections here is free."