Leo Herrmann (2 July 1853 – 1927) was a French anti-clerical painter.
Herrmann was educated at the École des Beaux-Arts, and learned under the tutelage Ernest Meissonier.
He entered the Parisian art scene in 1875 at the Paris Salon.
Herrmann occasionally painted dandies or soldiers, but became a successful artist by creating works that depict cardinals wearing red cassocks in comical scenarios.Some of his paintings have clerics feeding swans; others have cardinals themselves painting.
Another has a cardinal drinking wine through a long straw.