The structure, including the adjacent housing was rebuilt in 1740-1758, with completion of the large hall in the library with the ceiling frescoed by Carlo Innocenzo Carloni with the Glory of St Philip Neri.
[1] The Oratorians valued both devotion and knowledge and completed the large walnut cabinets for storing books.
The library has Letters from cardinals Decio Azzolini; Pietro Vidoni, Vincenzo Monti, and Lazzaro Spallanzani.
[3] The library has a collection of 120,000 volumes including parchment books, manuscripts, codices, incunaboli, and engravings.
[5] The library has a monument dedicated to cavaliere Carlo Mancini, a local nobleman, and one of its prime donors, and a stucco bust of Francesco de Lemene; as well as many portraits of famous Lodigiani.