Kleines Berlin

SS-Gruppenführer Odilo Globočnik, the SS and Police Leader for the city, had ordered them to work in secrecy, because he had thought of creating a "secret passage" between his house and a court.

The Italian sector consists of a series of parallel tunnels connected by other perpendiculars, the better equipped with wooden benches, a first aid room and a toilet facilities.

It had been occupied exclusively by SS troops, partly because it was used by Globočnik to reach, from his home, offices located in the Court of Trieste, without going out into the open.

It had a total of four entrances: one in the garden of the villa above Ara (home of Globočnik), one in the basement of the courthouse, and two, including the main experiment, via Fabio Severo.

In the night of 29 April 1945, Gauleiter and Reich Defense Commissioner Friedrich Rainer together with Globočnik abandoned Trieste and fled to Austria.

On 30 April 1945 an insurrection broke out in Trieste led by the Italian anti-Fascist National Liberation Committee (Comitato di Liberazione Nazionale, or CLN).