From : https://en.wikipedia.org/wiki/Orpington_chicken

The original Black Orpington was bred by William Cook in the 1880s in Orpington, which at that time was in Kent in south-east England.^{[5]: 115} He crossed Minorcas, Langshans and Plymouth Rocks to create a new hybrid bird. It was bred as a dual-purpose utility chicken, to be reared both for eggs and for meat; Cook chose black as a colour that would not show the soot and grime of London.^{[8]: 158} He was also the breeder of the Orpington Duck.^{[9]: 74}