The Milan Triennial XII was the Triennial in Milan sanctioned by the Bureau of International Expositions (BIE) on the 5 May 1959. Its theme was House and School. It was held at the Palazzo dell'Arte and ran from 16 July 1960 to 4 November 1960.
Antti Nurmesniemi and Birger Kaipiainen both won Grand Prix. Ilmari Tapiovaara and Kyllikki Salmenhaara won gold, and Bertel Gardberg a silver medal.