On 9 April 1973, Carla Pellegrini opened the new facility of Galleria Milano with a solo show by one of the greatest Italian artists and designers, Enzo Mari. The exhibition was titled Hammer and Sickle: three ways an artist can take part in the class struggle, and it was a controversial success.

Today, almost 50 years later, an accurate reconstruction has been made, thanks to research involving the archives of Galleria Milano and Enzo Mari. In the gap that separates the perception of the symbol from the 1970s to the present, through the vision of an enlightened artist like Mari, it is possible to grasp an epochal change regarding not only the society, but also the cultural fabric and the deepest spirit of the city of Milan.