The construction of this building that joins Castelvecchio, the Medieval part, to the Magno Palazzo, the Renaissance part, was commissioned by the Prince-Bishop Francesco Alberti Poia (1677-1689). While faithfully following the architectonic lines of the Magno Palazzo’s external aspect – even retaining the frieze painted under the eaves- the interior of the new building, the Giunta Albertiana (named for the Prince-Bishop Alberti Poia), mirrored the decoration style of the late 17th century. It is quite evident in the stucco work on the vaults in the two rooms on the first floor, attributed to the Lomabard artist Girolamo Aliprandi. The Giunta Albertiana was erected and decorated between 1686 and 1688, possibly based on a project by Giuseppe Alberti, trusted painter and architect to the Prince-Bishop, and who was most probably responsible for the frescoed decoration.