Cambridge is a university city and the county town of Cambridgeshire, England, on the River Cam approximately north of London. At the United Kingdom Census 2011, its population was 123,867, including 24,488 students. There is archaeological evidence of settlement in the area in the Bronze Age and in Roman Britain; under Viking rule, Cambridge became an important trading centre. The first town charters were granted in the 12th century, although city status was not conferred until 1951. The University of Cambridge, founded in 1209, is one of the top five universities in the world. The university includes the Cavendish Laboratory, Kings College Chapel, and the Cambridge University Library. The citys skyline is dominated by the last two buildings, along with the spire of the Our Lady and the English Martyrs Church, the chimney of Addenbrookes Hospital and St Johns College Chapel tower. Anglia Ruskin University, evolved from the Cambridge School of Art and the Cambridgeshire College of Arts and Technology, also has its main campus in the city. Cambridge is at the heart of the high-technology Silicon Fen with industries such as software and bioscience and many start-up companies born out of the university. More than 40% of the workforce has a higher education qualification, more than twice the national average. The Cambridge Biomedical Campus, one of the largest biomedical research clusters in the world, is soon to be home to AstraZeneca, a hotel and the relocated Papworth Hospital. Parkers Piece hosted the first ever game of Association football. The Strawberry Fair music and arts festival and Midsummer Fairs are held on Midsummer Common, and the annual Cambridge Beer Festival takes place on Jesus Green. The city is adjacent to the M11 and A14 roads, and Cambridge station is less than an hour from London Kings Cross railway station.