The interior is lavishly decorated in the Baroque style and much of the furnishings and furniture remain intact. It  is divided into four different areas: The Italian  Old Masters, with paintings by Tintoretto, (A  Portrait of a Venetian Senator, 1518-1594), Ghirlandaio, Veronese and Titian,  Guido Reni and  Domenichino;

The  Flemish Old Masters with paintings by Paul Brill, Jan Gossaert (Madonna of Cherries); and Tuscan paintings which include those of Domenico Beccafumi (Continence of Scipione, 1486-1551), Agnolo Bronzino (Portrait of Don Garzia de' Medici child, 1503-1572), Pontorno (Portrait of a Young Man, 1494-1566), Andrea Del Sarto (The Virgin and St. Anne).

 There are also  19th-century works by Pompeo Batoni, Stefano Tofanelli and Bernardino Nocchi. Moreover, antique tools and textiles including looms, religious vestments, vintage clothes, 17th and 18th century fabrics, give you a useful insight into the hugely profitable textile industry in Lucca at the time.

There is also a collection of paintings which was donated by the Grand Duke Leopold II of Habsburg Lorraine, father of  Ferdinand III of Habsburg-Lorraine who was Grand Duke of Tuscany twice, first from 1790 to 1799 and then from 1814 to 1824.