With your youth card you get free entrance, but you have to be under 26 years old! The Grand Duke Jean Museum of Modern Art (Mudam) is a Luxembourg museum dedicated to modern art, located in the Kirchberg district of Luxembourg City. It has three levels and a surface area of 4,800 m². The Mudam is the Luxembourg counterpart of world-class contemporary art museums such as the Centre pompidou (Paris), the Mamco (Geneva), the Moma (New York).