This Italian postage stamp, issued in 1966 with a denomination of 40 Lire, commemorates the 50th anniversary of the execution of Cesare Battisti, Fabio Filzi, Damiano Chiesa, and Nazario Sauro—four Italian patriots from Trento and Trieste who were captured and executed by Austria-Hungary during World War I. Their sacrifice became a powerful symbol of Italian irredentism and unity.

The stamp features the portraits of the four heroes in military uniform, with the Castello del Buonconsiglio of Trento in the background—site of Battisti’s execution. The design honors their courage and the ongoing memory of the struggle for national identity and freedom.