A windowless concrete hexagon on a glass base. From the northern part of the square neighboring student house a glazed bridge leads to this hexagonal extension, which houses a stage, a recording studio and a music room. The small theater, which can accommodate 110 visitors, has a variable stage and is technically equipped to allow many design experiments.

The façade of the exposed concrete structure is decorated with a swarm of small round aluminum panes, whose constantly changing interplay of light and shadow makes it appear less closed. 

The shape of the hexagon is also reflected in a network of numerous wagon-shaped concrete planters arranged around the building and in the floor plan of the large Audimax building nearby.

Heritage protected since 2008. Recently renovated. In 2019, it was partially closed for around 3 to 4 years due to fire safety deficiencies. The Infopoint and the cafeteria in the base are not affected (last updated on October 8, 2024).