Piedmont is one of the 20 regions of Italy. It has an area of 25,402 square kilometres (9,808 sq mi) and a population of about 4.6 million. The capital of Piedmont is Turin. The region contains major industrial centres, the main of which is Turin, home to the FIAT automobile works. Olivetti, once a major electronics industry whose plant was in Scarmagno, near Ivrea, has now turned into a small-scale computer service company. The city of Asti is located about 55 kilometres (34 miles) east of Turin in the plain of the Tanaro River and is one of the most important centers of Montferrat, one of the best known Italian wine districts in the world, declared officially on 22 June 2014 a UNESCO World Heritage site.