The connection between music and architecture has been known since ancient times. The Pythagoreans believed that the whole of nature was simulated by numbers and that the mathematical principles determined the whole cosmos. Schelling described architecture as "frozen music" and Goethe as "muted musical art". Terms such as "harmony", "golden section" or "Fibonacci sequence" repeatedly crossed between these two disciplines. Music can be performed anywhere; in a concert hall or outdoors. This seminar will present an overview of the close relationship between music and architecture. Rooms have always been redesigned to meet the artistic needs of the time. Internal church spaces (for choir performances) have been redesigned, concert halls (Bayreuther Festspielhaus) and pavilions (LeCorbusier & Xenakis) have been built, public spaces have been used for happenings (Fluxus & Action Art). What effect does space have on human perception? Is it only about acoustics or also about aesthetics? A journey from music room of the 17th century to the Elbphilharmonie and everything in between.