Torre Littoria, or Grattacielo Reale Mutua, is the first high-rise building in Turin, and one of the most renowned rationalist buildings in Italy. It is located in the city centre, on Via Giovanni Battista Viotti, near Piazza Castello.Torre Littoria was built in 1933-34, with the intent of hosting, among other offices, the national headquarters of the National Fascist Party; in fact it never did, with the party's headquarters located first in Milan and then in Rome.