The former Van Nelle Factory (Van Nellefabriek) on the Schie in Rotterdam, is considered a prime example of the International Style based upon constructivist architecture. It has been a designated UNESCO World Heritage Site since 2014. Soon after it was built, prominent architects described the factory as "the most beautiful spectacle of the modern age" (Le Corbusier in 1932) and "a poem in steel and glass" (Robertson in 1930).
The buildings were designed by architect Leendert van der Vlugt from the Brinkman & Van der Vlugt office in cooperation with civil engineer J.G. Wiebenga, at that time a specialist for constructions in reinforced concrete, and built between 1925 and 1931. It is an example of Nieuwe Bouwen, modern architecture in the Netherlands. It was commissioned by the co-owner of the Van Nelle company, Cees van der Leeuw, on behalf of the owners. Van der Leeuw and both company-directors, Matthijs de Bruyn and Bertus Sonneveld, were so impressed by the sk