Lingotto is a district of Turin, Italy, and the location of the Lingotto building in Via Nizza. This building once housed an automobile factory built by Fiat. Construction started in 1916 and the building opened in 1923. The design (by young architect Matté Trucco) was unusual in that it had five floors, with raw materials going in at the ground floor, and cars built on a line that went up through the building. Finished cars emerged at rooftop level to go onto the test track. It was the largest car factory in the world at that time. For its time, the Lingotto building was avante-garde, influential and impressive—Le Corbusier called it "one of the most impressive sights in industry", and "a guideline for town planning".