University of Cambridge is the world's leading public research university based in Cambridge, England, under the collegiate system. Together with the University of Oxford, it is also known as Oxsword, and is one of the "G5 super elite universities" along with the University of Oxford, University College London, Imperial College London and The London School of Economics and Political Science. The University of Cambridge is the second oldest university in the English-speaking world, having its roots in an association of scholars founded in 1209. More than eight hundred years of history has brought together: • Scientific luminaries including Newton, Kelvin, Maxwell, Bohr, Born, Dirac, Oppenheimer, Hawking, Darwin, Watson and Crick, Malthus, Marshall, Keynes, Turing, Wiles, Hua Luogeng, Milton, byron, Tennyson, bacon, Russell, wittgenstein • Political figures such as Cromwell, Nehru and Lee Kuan Yew • 15 British prime ministers including Robert Walpole (the first) • 120 Nobel Prize winners (second in the world), 11 Fields Medal winners (sixth in the world), and 7 Turing Prize winners (eighth in the world). The University of Cambridge is recognized as one of the world's leading institutions of higher education with its high academic standing and wide influence in many fields. The University of Cambridge is a member of the UK's Russell Group of universities, the Golden Triangle and the Cambridge University Medical Partnership, and is the parent of Silicon Fen, a technology cluster. The university has eight arts and sciences museums, a library system with a collection of over 15 million volumes, and Cambridge University Press, the oldest publishing house in the world. In 2019-20, the University of Cambridge was ranked 3rd in the world by The Times Higher Education World University Rankings, 7th in the world by the QS World University Rankings, 9th in the world by the US News World University Rankings, 3rd in the world by Academic Rankings and 4th in the World by The Times Higher Education World University Reputation Rankings.