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dk nkf - Nordisk Konservatorforbund Danmark

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Fig 5: South façade of the engine house. An elevated<br />

monorail connects the coal washery and the boiler house, early<br />

20th century (Bergbau-Archiv, Bochum)<br />

Fig 6: Interior space of the engine house with air compressors<br />

and winding machines, early 20th century (Siemens Archives,<br />

Munic)<br />

Fig 7: Marble Switchboard, early 20th century (Siemens<br />

Archives, Munic)<br />

196<br />

sustainable approach to reconstruction demands<br />

that it must be comprehensively replaced. This has<br />

not made it easier for us to answer current questions<br />

regarding the best methods of conservation.<br />

Other questions facing us include: “How do we<br />

make museum use compatible with monument<br />

preservation?”; and “What are our priorities? To<br />

conserve the material and the colouring handed<br />

down to us or to highlight the original idea behind<br />

the building as an impressive showplace for the<br />

outside world? How much reconstruction does there<br />

have to be, and how much is permissible?”<br />

From decline to a living<br />

museum – a short survey:<br />

1935: Plans are drawn up for a new central shaft<br />

in the adjacent Zollern and Germania coalfields.<br />

Hence all further investment in the old technical<br />

equipment is stopped. Due to the lack of building<br />

materials work on the erection of the central shaft<br />

ceases between 1939 and the 1950s, with the<br />

exception of two more powerful compressors and<br />

electrical equipment which are installed in the<br />

Zollern engine house in 1940.<br />

1955: Coal ceases to be brought to the surface at<br />

the Zollern colliery and this operation is transferred<br />

to the new Germania central pit a few kilometres<br />

away. Shaft No. II is henceforth only used to<br />

transport men and material underground. The<br />

Jugendstil canopy above the entrance of the engine<br />

house is dismantled and much of the damage to the<br />

brickwork is stabilised in a basic manner.<br />

1966: Zollern colliery finally closes and the buildings<br />

on the site are let out to different companies.<br />

1969: Plans to demolish the engine house are met<br />

with a grass-roots campaign of heavy protest. At the<br />

end of the year the engine house is recognised as<br />

an icon of modern industrial design and put under<br />

a preservation order. This signals the start of a<br />

new movement to preserve industrial buildings in<br />

Western Germany.<br />

The photographers Bernd and Hilla Becher, who<br />

were very little known at the time, start their unique<br />

documentation work of industrial buildings [9] by

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