Derby is a unitary authority located next to the Derwent River, in England, which has 221,716 inhabitants. In Derby is one of the most important railway stations in England. Derby is known for the manufacture of the Crown Derby, which is a high quality porcelain, also makes parts for vehicles and aircraft. In the times of Ancient Rome a military post was built in this place, where a British colony was located. This municipality reached a great prosperity with the arrival of the railroad in the middle of the XIX century. In 1977 Derby was declared a city. The city gives name, usually in soccer, to the confrontations of two teams of the same city. Also to an important horse race.