Landmark Jugendstil colliery in Dortmund-Bövinghausen, now the LWL-Industriemuseum Zeche Zollern, an anchor point of the European Route of Industrial Culture.
Zeche Zollern II/IV was a hard coal colliery in the Dortmund district of Bövinghausen, developed from 1898 as the Musterzeche of the Gelsenkirchener Bergwerks-AG (GBAG). The installation was intended to project economic power and modernity; its architecture, designed by the GBAG's Paul Knobbe in the transition between Historismus and Jugendstil, gave it the character of a manor house rather than a mine. Shaft sinking began in 1898, coal production commenced at Schacht II in 1902–03, and by 1904 the above-ground buildings were essentially complete.
Most significantly, Zeche Zollern II/IV was the first fully electrified colliery in the Ruhr, and the solution to powering its electric winding engine — a combination of the Ward-Leonard circuit and the Ilgner flywheel converter — resolved a technical challenge that had previously prevented the adoption of electric winding at deep main shafts. Coal production was halted in 1955 and the colliery was finally closed in 1966. The original headframes were removed — that over Schacht IV in 1940, that over Schacht II in 1969.
In 1969 the Maschinenhalle was listed as the first industrial building in Germany to receive monument protection, saving the entire ensemble from planned demolition. Both headframes were replaced in 1986–88 with structurally identical examples transferred from neighbouring collieries. The site has been operated as the LWL-Industriemuseum Zeche Zollern, the central location of the Westfälisches Industriemuseum of the Landschaftsverband Westfalen-Lippe, since 1981, and is a major anchor point of both the Route der Industriekultur and the European Route of Industrial Culture (ERIH).
The origins of the site lie in the mid-nineteenth-century development of the coalfields of the Dortmunder Westen. Two adjacent shaft installations were ultimately developed under the Zollern name, with separate underground connections to each other and to further neighbouring collieries: the Schachtanlage I/III in the district of Kirchlinde and the Schachtanlage II/IV in Bövinghausen. In 1898 the Gelsenkirchener Bergwerks-AG (GBAG) began both the shaft sinking and the construction of the above-ground buildings of the Schachtanlage II/IV.
The design was commissioned from the GBAG's own architect Paul Knobbe in a historicist style that deliberately evoked a Schloss or manor house: a formal brick facade with decorative gables, corner turrets, and a courtyard ensemble of pit-head buildings around a green Ehrenhof. The installation was intended as a Musterzeche — a model or exemplary colliery — to demonstrate the GBAG's technological and architectural ambitions. The regulär coal production was begun at Schacht II in 1902 in a modest volume and taken up fully in 1903; by 1904 the above-ground buildings were essentially completed and a printed guidebook of the following year described the complex as resembling 'a feudal courtyard rather than an industrial site'.
The Maschinenhalle, housing the winding and pumping machinery, was the centrepiece of the design. As originally planned by Knobbe it was to be built in massive masonry, but was ultimately executed, in the interest of faster completion, as a steel frame construction with brick infill panels, the roof and facade incorporating large areas of glazing. The interior featured a grand Jugendstil portal and, on a raised dais against the far wall, a marble switching panel richly fitted with original instruments, surmounted by a finely designed Jugendstil clock.
Of decisive technical significance was the decision to power the installation entirely by electricity, making Zeche Zollern II/IV the first fully electrified colliery in the Ruhr. The specific challenge overcome was that of powering the main winding engine at Schacht II electrically: previous experience had shown that the enormous current surges required to accelerate the skip and cage from rest would collapse the colliery's power network. The solution adopted — a combination of the Ward-Leonard circuit, patented in 1891 by the American Harry Ward Leonard (1861–1915), and the Ilgner flywheel converter developed by Karl Ilgner (1862–1921) — absorbed and smoothed the surge by storing energy in a heavy flywheel and releasing it progressively.
This technical achievement, brought into service shortly after 1900, became the standard for electric winding in deep Ruhr shafts for decades. The shafts reached a depth of 466 m (the figure given in sources for the working depth by 1935). The coke works, which had been constructed as part of the original installation, was taken out of service in 1918 and demolished shortly afterwards.
By 1930 the GBAG had resolved that future production from several Dortmunder western coalfields would be concentrated in a new Zentralschacht at the planned Germania installation in Dortmund-Marten. From that point Zeche Zollern II/IV was operated on a run-down basis without major modernisation — a decision that, ironically, preserved the original building fabric substantially intact to the end of coal production. The headframe over Schacht IV was removed in 1940, disturbing the symmetry of the Zechenanlage.
The headframe over Schacht II was removed in 1969. Coal production at the Schachtanlage II/IV was halted in 1955; the colliery was finally closed in 1966. After the closure the shafts were backfilled: Schacht IV in 1966 and Schacht II in 1967.
By the late 1960s the entire ensemble faced complete demolition, including a plan to route a new urban road through the site. The ensemble's salvation came in 1969 when growing awareness of the significance of the Maschinenhalle among architects, historians, and the public led to its listing as the first industrial building in Germany to be placed under monument protection. The listing of the Maschinenhalle saved the entire Anlage from demolition.
In 1979 the site was incorporated into the Westfälisches Industriemuseum of the Landschaftsverband Westfalen-Lippe and large-scale restoration of the ensemble began. Between 1986 and 1988 the two missing headframes were replaced: both are structurally identical to the originals, one transferred from the Zeche Wilhelmine Victoria in Gelsenkirchen (placed over Schacht II), the other from the Zeche Friedrich der Große in Herne (placed over Schacht IV), both moved complete with their shaft halls. The museum was formally opened in October 1999 as a museum of the social and cultural history of Ruhr mining.
A comprehensive restoration of the Maschinenhalle was completed in 2016. Adjacent to the colliery, and architecturally continuous with it, is the Kolonie Landwehr, a workers' housing colony of a director's villa, eight foremen's houses, and 23 workers' houses built by the GBAG by 1904, also to the design of Paul Knobbe, and listed as part of the same ensemble. The LWL-Industriemuseum Zeche Zollern is today the central seat of the Westfälisches Industriemuseum, which comprises eight museum sites across Westphalia.
The site is an Ankerpunkt (anchor point) of both the Route der Industriekultur in the Ruhr and the European Route of Industrial Culture (ERIH).