After the closure of the Rheinpreussen mine in 1989, planning began to convert the former colliery building to a technology centre. The brick structure, dating from 1906, is T-shaped on plan and has a central hall that acts as a kind of forum for various groups of users. Two rows of concrete office units were inserted along the main axis of the hall, creating a central corridor. The two tracts are linked at the top by steel walkways. Concrete is used as an autonomous compositional material contrasted with the existing brickwork.