The city of Cambridge is a university town and the administrative centre of the county of Cambridgeshire, England. It lies in East Anglia, on the River Cam, about 50 miles (80 km) north from London.
Cambridge is most widely known as the home of the University of Cambridge, founded in 1209 and consistently ranked one of the top five universities in the world. The university includes the renowned Cavendish Laboratory, King's College Chapel, and the Cambridge University Library. The Cambridge skyline is dominated by the last two buildings, along with the chimney of Addenbrooke's Hospital in the far south of the city and St John's College Chapel tower.
Settlements have existed around the Cambridge area since before the Roman Empire After the Romans had left, Saxons took over the land on and around Castle Hill and renamed it Grantabrycge – 'Bridge over the river Granta'. Over time the name evolved to become Cambridge, while the river Granta became known as the river Cam to match the name of the city.
Today Cambridge has a diverse economy with strength in sectors such as research & development, software consultancy, high value engineering, creative industries, pharmaceuticals and tourism. Described as one of the "most beautiful cities in the world" by Forbes in 2010, tourism generates over £350 million for the city's economy. Cambridge and its surrounds are sometimes referred to as Silicon Fen, an allusion to Silicon Valley, because of the density of high-tech businesses and technology incubators that have developed on science parks around the city.