Milan Triennial XIII  The Milan Triennial XIII was the Triennial in Milan on the theme of "Leisure", sanctioned by the Bureau of International Expositions (BIE) on 12 November 1963 and held between 12 June 1964 and 27 September 1964. The grand priz was awarded to Antti and Vuokko Nurmesniemi for an exhibition display, and a gold medal to Ilmari Tapiovaara for cutlery, and Gae Aulenti first prize for her work on the Italian pavilion.