The Triennale di Milano is a museum of art and design in the Parco Sempione in Milan, in Lombardy in northern Italy. It is housed in the Palazzo dell'Arte, built between 1931 and 1933 to designs by Giovanni Muzio and financed by Antonio Bernocchi and his brothers Andrea and Michele. The building houses a theatre, the Teatro dell'Arte, which was also designed by Muzio.