The appointment with the Salone returns every year in May at Lingotto, the famous Fiat plant with the spiral ramp and roof-top test track, a masterpiece of industrial archaeology. Designed between 1915 and 1922 and admired by Le Corbusier, since 1985 it has been transformed by Renzo Piano into an exhibition, conference and commercial centre. In 2007 the Salone celebrated its 20th anniversary. With six pavilions, an area of 51,000 square metres, 27 conference rooms, over 1,400 publishers and about 300,000 visitors in the five days it is open, it is today the largest fair in Italy dedicated to publishing, reading and culture, and one of the leaders in Europe. The 23rd Salone Internazionale del Libro will be held from Thursday 13 to Monday 17 May 2010.