In April 2016, the Kunstmuseum Basel is opening its new building, increasing its exhibition space by approximately two thirds. Designed by the architectural office Christ & Gantenbein, the building is completely in the service of art-solitary in its outward appearance, it is nevertheless closely linked to the Kunstmuseum, both in formal terms as well as by means of an underground connecting tract. This publication introduces the building in all of its facets for the first time. In extensive texts, the director of the Kunstmuseum Basel, Bernhard Mendes Bürgi, and the architect Emanuel Christ describe the concept as well as the content-related and artistic aspects of this new building; Mechtild Widrich looks at it in the general context of museum architecture. Layout drawings and numerous illustrations complete the overview.