The archeologic museum is housed in the Palazzo Faina, attached near the crossing to the South of the Cathedral building.

The southern flank of the palace constitutes Via Lorenzo Maitani, and the Palazzo Netti is a few houses west on this alley.

One oral tradition holds that the original start was due to the donation by Princess Maria Bonaparte (daughter of Lucien) of 34 ancient vases to the Mauro (uncle of Eugenio).

In 1855–1856, the count had purchased a medieval palace at the site, belonging to the Monaldeschi family, which had undergone a number of refurbishment.

The Faina family set to have the halls and rooms of the piano nobile frescoed by Annibale Angelini, who painted them from 1865 to 1866.