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The second-oldest surviving university in the world and the oldest in the English-speaking world. Although its exact date of foundation is unclear, there is evidence of teaching as far back as 1096.

Most undergraduate teaching at Oxford is organised around weekly tutorials at self-governing colleges and halls, supported by classes, lectures and laboratory work organised by University faculties and departments, the university is spread around the city.

More details at Wikipedia Link
University website: Link

The Bodleian Library the main research library of the University of Oxford, is one of the oldest libraries in Europe, and in Britain is second in size only to the British Library with over 11 million items. Known to Oxford scholars as "Bodley" or simply "the Bod", under the Legal Deposit Libraries Act 2003 it is one of six legal deposit libraries for works published in the United Kingdom and under Irish Law it is entitled to request a copy of each book published in the Republic of Ireland. The Bodleian operates principally as a reference library and in general documents may not be removed from the reading rooms.
Grade I listed. Link
Wikipedia: Link

Grade I listed buildings and structures are of exceptional, even international importance. There are over 6,000 in the country. Only 2.5% of listed buildings are Grade I listed.
In Scotland the classification is Category A
Index: Link