He worked mostly in monumental and funerary sculpture; his style was representational, and far from the modernist and avant-garde trends of the early twentieth century.

A daughter named Piera died in her infancy and is memorialised with a funerary sculpture by her father.

In the Fascist era he worked on sculptures for war cemeteries and monuments to the dead of the First World War, including: the military memorial of Monte Grappa (1935) in the Veneto; the Tempio Ossario di Timau [it] (1937) in the comune of Paluzza, Udine; the military ossuary of Caporetto, now Kobarid, Slovenia; and the war memorial of Redipuglia (1938) in the province of Gorizia.

[6] Castiglioni won the competition for the prize medal at the Milan International Exhibition in 1906.

[2] He left more than three hundred of his preparatory plaster casts to the comune of Lierna; a museum is to house them is under construction.