Palazzo Nuovo

Statues, inscriptions, sarcophagi, busts, mosaics, and other ancient Roman artifacts occupy two floors of the Palazzo Nuovo.
In the Hall of the Galatian can also be appreciated the marble statue of the "Dying Gaul" also called “Capitoline Gaul” and the statue of Cupid and Psyche. Also housed in this building are:

• the colossal statue restored as Oceanus, located in the museum courtyard of this building
  
• a fragment of the Tabula Iliaca located at the Hall of the Doves
  
• the statue of Capitoline Venus, from an original by Praxiteles (4th century BC)
  

Galleria Congiunzione

The Galleria Congiunzione is located beneath the Palazzo dei Conservatori and the piazza itself, and links the three palazzos sitting on the piazza. The gallery was constructed in the 1930s. It contains in situ 2nd century ruins of ancient Roman dwellings, and also houses the Galleria Lapidaria, which displays the Museums' collection of epigraphs.

New wing

The new great glass covered hall - the Sala Marco Aurelio - created by covering the Giardino Romano is similar to the one used for the Sala Ottagonale and British Museum Great Court. The design is by the architect Carlo Aymonino. Its volume recalls that of the oval space designed by Michelangelo for the piazza.
Its centrepiece is the bronze equestrian statue of Marcus Aurelius, which was once in the centre of Piazza del Campidoglio and has been kept indoors ever since its modern restoration. Moving these statues out of the palazzo allows those sculptures temporarily moved to the Centrale Montemartini to be brought back. It also houses the remaining fragments of the bronze colossus of Constantine and the archaeological remains of the tufa foundations of the temple of Capitoline Jupiter, with a model, drawn and computer reconstructions and finds dating from the earliest occupation on the site (in the mid Bronze Age: 17th-14th centuries B.C.) to the foundation of the temple (6th century BC). The new Sala was used on 14 June 2007 to launch the 45th anniversary celebrations for the fashion designer Valentino Garavani.[1][2]
In the three halls adjacent to the Appartamento dei Conservatori are to be found the showcases of the famous Castellani Collection with a part of the magnificent set of Greek and Etruscan vases that was donated to the Municipality of Rome by Augusto Castellani in the mid 19th century.