Copper engraving, 600x780 mm, engraved by P. Allodi at the Vallardi publishing house, complete with the publisher's cover with printed title. Large and beautiful map depicting the city at the time of Italian unification, from the monumental cemetery at Porta Ticinese to Porta Magenta and Porta Vittoria. For better preservation, the map has been reinforced on the back and is flat, making it difficult to fold. Legend with 91 references at the top left and a box showing the surroundings of Milan on the right.