Installation is the work of changing the museum from building site, to workshop, to public space. Despite extensive plans the process remains a creative, lively activity, rich in both narrative and resistance. As the galleries are moved from paper to place the transitional space is contested; interrogated by changing populations and altered by material contexts. This article is based on original research, from a position working on the installation of the Galleries of Modern London. Supplemented by interviews with key staff, the chapter offers reflection on what installation reveals about museums as process and place.