In France’s latest art heist, two thieves broke into Pierre-Auguste Renoir ’s house and stole four of his paintings.

Valuable Renoir paintings were stolen early Tuesday from a small museum on the French Riviera, and investigators were hunting for the suspected thieves, police said.

Thieves managed to steal two Renoir paintings from the Musée Renoir early on Tuesday morning— ”Madame Colonna Romana,” a 1910 portrait of a silent film actress, and “Jeune femme au puits” (Young Woman...