This publication is based on two exhibitions held at the Migros Museum in Zurich, both of which were dedicated, in different ways, to exploring the possibilities of documenting time-based works. It aims to outline the theories that underpin these issues in discussing the various ways in which disciplines that are fixed in time, such as sculpture and installation, or technologically reproducible media, such as film and photography, relate to time-based fields of art that are performative in character, such as dance, performance and sound, in diverse combinations. The focus is on the areas created by these overlaps, and the art that is produced as a result. Published with the migros museum fur gegenwartskunst, Zurich. English and German text.