In 2018, one of the currently largest new museum buildings in Germany was opened in Mannheim, designed by the architects von Gerkan, Marg and Partners. Owing to its unique facade, which is characterized by a bronze-colored metal mesh, the new building of the Kunsthalle Mannheim integrates confidently with its surroundings. It links up with the historical museum building and has been designed as a “city within the city,” offering visitors interesting walking circuits with varying insights and views out. The centerpiece and prelude to the new building is formed by the freely accessible central atrium. In this volume of the gmp focus series, the architects illuminate their design and grant an insight into the challenges of the building task. In addition, an essay from architectural critic Jürgen Tietz examines why museums like the Kunsthalle Mannheim are still needed today.