Brief synthesisThe Derwent valley, upstream from Derby on the southern edge of the Pennines, contains a series of 18th and 19th century cotton mills and an industrial landscape of high historical and technological significance. The workers' housing associated with this and the other mills are intact and span 24km of the Derwent valley from the edge of Matlock Bath in the north nearly to the centre of Derby in the south. In terms of industrial buildings the Derwent valley mills may be considered to be sui generis in the sense that they were the first of what was to become the model for factories throughout the world in subsequent centuries. Criterion (iv): In the Derwent Valley for the first time there was large-scale industrial production in a hitherto rural landscape. The coordination mechanism is provided by the Derwent Valley Mills Partnership.