There are two major attractions in the Invalides. The first is the Military Museum (Musée de l’Armée), which houses a rich collection of military relics from ancient times to the present. The museum was first established in 1871 and was called the Artillery Museum. In 1896, the Military History Museum was established. In 1905, the two museums merged to become the current Military Museum. The exhibition area is 12,000 square meters, and the collection exceeds 500,000 pieces, including weapons, armor, firearms, uniforms, paintings and other forms of collections. The second is Napoleon's Mausoleum. Napoleon's coffin was moved to the bottom of the church dome on April 2, 1861, and placed on the first floor of the church, so that visitors can overlook it from the circular corridor on the second floor. The tombs of Napoleon's other relatives and other generals are also located here. Napoleon's coffin is made of red quartzite and placed on a green granite base. There are 12 relief paintings of the goddess of victory engraved on the walls of the corridor around the church, each representing a glorious battle.