What has emerged at Grillo Theatre is nothing short of extraordinary. Architect Georg Ruhnau has reimagined the former "Heldenbar" event space as a multifunctional theatre with variable topography—a transformation that culminated in its September 2023 opening after two years of careful planning and construction.The journey began with a complete gutting of the original space. Its cramped layout, dominated by a massive concrete technical gallery and wooden wall and floor fixtures, was stripped away entirely. This allowed the architect to work with an open canvas defined by the space's striking window systems.Working closely with the theatre's technical team, Ruhnau installed 61 scissor lift platforms in various sizes, capable of rising between 0.5 and 1.5 metres. This flexible floor system accommodates 60 to 170 spectators depending on the configuration. The newly redesigned multi-storey windows feature strategically varied glass thicknesses to minimize external noise intrusion. Acoustic specialist Brigitte Graner contributed wall coverings with approximately 21 million micro-perforations across the north and south walls—a sophisticated solution that maintains acoustic integrity without visual obstruction.The technical infrastructure received a complete overhaul as well. New coffered wall panels discreetly house extensive media technology components. A slender steel structure supports the refurbished technical gallery above, while the ventilation and climate control systems rest in the roof space, acoustically isolated for optimal performance.The colour palette—warm, inviting tones throughout—establishes a welcoming ambiance whether illuminated by daylight, standard house lighting, or dramatic scenic effects. The result is a versatile venue that maximizes volume, flexibility, and comfort while remaining suitable for diverse event types.

www.ruhnau.de

Photography Credits:

Philip Kistner

Duschner/Ruhnau/TBE

Thomas Robbin
www.thomasrobbin.de

(Published in CUBE Ruhrgebiet 04|23)