Giorgio Grassi (born 1935) is one of Italy's most important modern architects, and part of the so-called Italian rationalist school, also known as La Tendenza, associated most famously with Carlo Aymonino and Aldo Rossi that emerged in Italy in the 1960s. Much influenced by Ludwig Hilberseimer, Heinrich Tessenow and Adolf Loos, Grassi's architecture is the most severely rational of the group: his extremely formal work is predicated on absolute simplicity, clarity, and honesty without ingratiation, rhetoric, or spectacular shape-making; it refers to historical archetypes of form and space and has a strong concern with the making of urban space. For these reasons Grassi is a non-conformist and a critic of conventional mainstream architecture.

Grassi and Rossi

Grassi studied architecture at the Politecnico di Milano university, where he graduated in 1960. He worked for the magazine Casabella-continuita for 3 years until 1964 and has been professor at the Politecnico di Milano and other universities since 1965. Grassi is a prolific writer and theorist, having most notably written The Logical Construction of Architecture (1967), Architecture as a Craft (1979) and other influential works. Together with Aldo Rossi, Grassi argued that architecture had to look within itself to an autonomous methodology, separate from political, economic, social and technological events.

Neo-Rationalism

Though described as severely rational, Grassi's architecture also incorporates a sensitivity to classical and neo-classical architecture (Alberti, Schinkel) but is at the same time deeply influenced by the modern movement, especially in Germany and Austria. Grassi's trademarks are his use of exposed brick in most of his buildings as well as square windows. In his writings, he refers to the socialist German architects of the 1920s as well as references to selected public buildings and public spaces as his guidelines. His works have been extensively published in the top international architecture magazines. The work of Marxist architectural historian Manfredo Tafuri also influenced Grassi and the La Tendenza movement, and the University Iuav of Venice emerged as a centre of the group after Tafuri became chair of Architecture History in 1968. A Tendenza exhibition was organized for the 1973 Milan Triennale.

Since 1977, is a professor at Politecnico in Milan and he is an honorary member of Bund Deutscher Architekten and the Internationale Bauakademie of Berlin.