Markus Breitschmid (born 20 April 1966, Lucerne, Switzerland) is a Swiss-American architectural theoretician and the author of several books on contemporary architecture and philosophical aesthetics. His most highly regarded books are Der bauende Geist. Friedrich Nietzsche und die Architektur (2001), The Significance of the Idea (2008, first print), and Non-Referential Architecture (2018, first edition). His writings have been translated into Chinese, English, French, German, Hindi, Italian, Japanese, Korean, Russian, and Spanish. Breitschmid has been invited to contribute to the Venice Biennale of Architecture, the Architecture Biennale of Chicago, and the Triennale of Architecture in Lisbon.