The museum, housed in Joe Petrosino's birthplace, is the only house-museum dedicated to an exponent of the forces in the order. Giuseppe Petrosino was born in this house on August 30, 1860. Within these walls, little Giuseppe lived up to 13 years, when in 1873 together with his father Prospero, tailor, and the whole family, he left for America. This case of ordinary emigration determined the fate of Joseph who would later become the great, legendary Joe, the most famous policeman in America. Giuseppe's relatives continued to live in this house to this day: brother, grandchildren, great-grandson. All were faithful custodians of these environments which, through several generations, have preserved the memory of those years, in the succession of the many departures and the few returns linked to the dream of emigration. The furnishings and objects have come down to us almost intact. Here is the story of the great southern emigration that unfolded from the late nineteenth century to the early twentieth century. During this period, the changed conditions of life have led to slight transformations that have not at all distorted the authenticity of this testimony. The introduction of electric light, or the new liberty furniture in the dining room, purchased by grandfather Michele, Joe's last brother, who returns home with the small nest egg spared in the States, become very significant chapters in the history of southern emigration. It was through the visualization and reification of the new well-being that the returning emigrant showed pride in not leaving in vain to the fellow villagers who remained at home. Electric light, new furniture, clock and gold chain, the same way of dressing become an explicit declaration of success. The museum also displays memorabilia and documents relating to the heroic activity of the policeman. All this makes the visit more suggestive by making those who go there experience the same emotions as those who have lived there, stimulating values of legality and justice. The exhibition runs through its 24 sections, the period from 1860 to the present day offering glimpses of legality, justice and healthy emigration, all richly narrated by the uniformed custodians / guides of the New York police.