From the Wikipedia: "The National Museum of Rome (Museo Nazionale Romano in Italian) is a set of museums in Rome, Italy, split between various branches across the city. It was founded in 1889 and inaugurated in 1890, with the aim of collecting antiquities from between the 5th century BC to the 3rd century AD.

Its first collection was formed from the archeological collections of the Museo Kircheriano and the numerous new discoveries in Rome during the city-planning after it became the new capital of the new Kingdom of Italy. This was initially meant to be displayed in a 'Museo Tiberino' (never realised), but in 1901 the State granted the institution the Villa Ludovisi and the important national collection of ancient sculptures.

Its base was established in the 16th century cloister built by Michelangelo off the baths of Diocletian, still its main base. These buildings' adaptation to their new purpose began for the 1911 Exposition and completed in the 1930s."