The National Galleries Barberini and Corsini contain paintings and sculptures of exceptional historical and artistic value. Page after page, through the masterpieces of many of the greatest Italian artists from the Middle Ages to the 18th century (Angelico, Raphael, Piero di Cosimo, Bronzino, Lotto, Tintoretto, Cortona, Caravaggio, Bernini, Reni, Guercino, Batoni, Canaletto) the reader can follow the development of art history. The collections also include artwork by Holbein, Murille and Van Dyck, besides a few antique pieces. In addition to the 100 entries, there are descriptions of particularly important elements that are part of the palaces' architecture, such as Borromini's spiral staircase, Bernini's main staircase and the huge ceiling frescoed by Pietro da Cortona.