The National Archaeological Museum of Naples (, sometimes abbreviated to MANN) is an important Italian archaeological museum, particularly for ancient Roman remains. Its collection includes works from Greek, Roman and Renaissance times, and especially Roman artifacts from the nearby Pompeii, Stabiae and Herculaneum sites. From 1816 to 1861, it was known as Real Museo Borbonico ("the Royal Bourbon Museum"). Building The building was built as a cavalry barracks in 1585. From 1616 to 1777 it was the seat of the University of Naples. During the 19th century, after it became a museum, it suffered many changes to the main structure. Collections The museum hosts extensive collections of Greek and Roman antiquities. Their core is from the Farnese Collection, which includes a collection of engraved gems (including the Farnese Cup, a Ptolemaic bowl made of sardonyx agate and the most famous piece in the "Treasure of the Magnificent", and is founded upon gems collected by Cosimo de' Medici and Lorenzo il Magnifico in the 15th century) and the Farnese Marbles. Among the notable works found in the museum are the Herculaneum papyri, carbonized by the eruption of Mount Vesuvius, found after 1752 in Villa of the Papyri. Marbles The greater part of the museum's classical sculpture collection largely comes from the Farnese Marbles, important since they include Roman copies of classical Greek sculpture, which are in many cases the only surviving indications of what the lost works by ancient Greek sculptors such as Calamis, Kritios and Nesiotes looked like. Many of these works, especially the larger ones, have been moved to the Museo di Capodimonte for display in recent years. The Farnese Hercules, which fixed the image of Hercules in the European imagination. The Farnese Atlas is the oldest extant depiction of Atlas from Greek mythology, and the oldest view of the Western constellations, possibly based upon the star catalog of Hipparchus The Farnese Bull, widely considered the largest single sculpture ever recovered from antiquity. The group Harmodius and Aristogeiton, a Roman copy of a bronze work that once stood in the Agora of Athens The Aphrodite Kallipygos The Farnese Artemis, again a Roman copy of a Greek original a collection of busts of Roman emperors another set of Roman sculptures (again mainly copies of Greek work) that (like the Hercules) once stood in the Baths of Caracalla in Rome. Bronzes from the Villa of the Papyri A major collection of