Viale XX Settembre (formerly via dell'Acquedotto) is one of the main pedestrian arteries of the city of Trieste. It extends for over a kilometer and is distributed over four of the seven historical districts of Trieste (i.e. the districts of Cologna, Borgo Teresiano, San Giovanni and Chiadino). The first section is completely pedestrianised, while cars can circulate in the second section. The avenue owes its name to the Breccia di Porta Pia, which occurred precisely on 20 September 1870. In the past the road was known as via dell'Acquedotto, as the city aqueduct still passes under the concrete today. The avenue is an excellent place for young people to have fun, and offers many attractions. For example, during the period of San Niccolò or for Carnival, stalls are set up. During these times of the year, the street is crowded with people. In the avenue there are also the "historic" cinemas of Trieste. It is also the headquarters of the Politeama Rossetti, a middle school and numerous restaurants, ice cream parlors, bars and fast food outlets.