Palazzo Castani - Credit: Wikimedia Commons
Palazzo Castani is a historic building located in the centre of Milan, at Piazza San Sepolcro 9, and today houses the Commissariato Centro of the Polizia di Stato. It was the national headquarters of the Partito Nazionale Fascista from 1921 to 1924, and of the Partito Fascista Repubblicano from 1943 to 1945. Read more on Wikipedia
Source: en.wikipedia.org