Home Deutsch   Contact Search PrivacySite Info
cooperation for better buildings
CompanyServicesReferences Emil Schumacher and Karl Ernst Osthaus Museum

References >Cultural area >Emil Schumacher and Karl Ernst Osthaus Museum, Hagen/Germany
Emil Schumacher and Karl Ernst Osthaus Museum, Hagen/Germany

planning, saving, building

In 2000, the urban development concept by Lindemann architects from Mannheim, won the first prize in the realisation competition, initiated by the city of Mannheim. The unusual architectural concept encompasses a complete museum complex in the center of Hagen. It considers the building substance of ‘Altes Amtsgericht’ (old local court), in need of redevelopment, and the extension of Karl Ernst Osthaus Museum, to be completed with a foyer and the new construction of the Emil Schumacher Museum (ESM).

As a special technical situation, the outer facade and the roof of ESM have been planned as a steel-glass construction, completely encasing the inner concrete cubus, with a clearance of 1.5 to 3.0 metres.

Owing to DIEDERICHS’ great experience in famous museum building projects and its proven success in achievements, the company was involved as project controller, in November 2000.

After DIEDERICHS had become part of the current planning, it was quickly revealed that the architects´pre-planning would go beyond the boundaries of the budgetary limit. As a consequence, DIEDERICHS initiated specific adaptation measure, which led to a cost reduction of more than 30%. During the course of the project, DIEDERICHS will ensure maintenance to the budget, following the basic architectural concept.

at a glance


City of Hagen


Lindemann Architekten,



Gross surface area

approx. 6.200 m²

Gross volume

approx. 33.000 m³


approx. 25,2 Mio. € gross


2000 to 2009


Capacity planning
Capital management
Co-ordination of planning participants
Contract management
Cost management
Cost planning
Dunning and arrears process
General planner selection procedure
Optimisation of building utilisation costs
Organisation management
Payment control
Planning control
Process control
Project accounting
Project control
Project handbook
Quality management
Schedule planning
Supplementary management
Variance analysis

DIEDERICHS International GmbH
Chausseestrasse 25
D-10115 Berlin, Germany

phone: +49 (0) 30. 21 23 38.38

Emil Schumacher Museum
Emil Schumacher Museum

Emil Schumacher Museum
Emil Schumacher Museum

Karl Ernst Osthaus Museum
Karl Ernst Osthaus Museum

all rights reserved © 2021 Diederichs International GmbH