In 1850 the art collector Gian Giacomo Poldi Pezzoli began the decoration of his own apartment within the family palace.
The result was a series of rooms inspired to various artistic and decorative styles of the past (Baroque, Medieval period, Early Renaissance, Rococo), designed and decorated by some of the most innovative artists of the time.
When Gian Giacomo Poldi Pezzoli's house-museum was opened to the public in 1881 for the Milan National Exhibition, it was visited by thousands of people.
From then on, the Poldi Pezzoli Museum became a model for other house-museum projects, including those of the American Isabella Stewart Gardner, Antonio Borgogna from Vercelli (Italy), and the French Jacquemart - Andrč.