One of the largest castles in Provence was built from the 10C on Puech rock by the emperors of the Germanic Holy Roman Empire (Empéri is the Provençal for empire); from the 13C-15C, the castle was the favourite residence of the archbishops of Arles. Today, the castle is home to the Musée de l'Empéri, a museum of art and military history, which houses one of the richest collections of French military uniforms, as well as flags, decorations, knives, firearms, cannons and paintings.