Between the summer of 2004 and the spring of 2006, the passageway in the basement was extensively modernised and adapted to become part of the Niki-de-Saint-Phalle-Promenade from Kröpcke to Raschplatz.
The passageway in the basement was extensively modernised and adapted to become part of the Niki-de-Saint-Phalle-Promenade from Kröpcke to Raschplatz. This was between the summer of 2004. This was between the spring of 2006.