"wiegenlied" delves into the acoustic properties and characteristics of the entrance hall of the Representation of the State of North Rhine-Westphalia in Berlin. An invisible dome of speakers architecturally reimagines the passageway. Here, the space transcends its role as a mere playback chamber for a pre-recorded composition incorporating sound fragments from the respective state (NRW); instead, it is examined as a sonic entity, seamlessly integrated into the composition itself. Beyond the structural components—glass, wood, steel, and concrete—and the architectural height, environmental sounds, and the daily activities of users such as opening and closing doors, footsteps, and conversations add to the dynamic noise level, becoming integral parts of the composition. The fusion of these sounds imparts a distinctive character and atmosphere to the space within this building.