when was oxford university founded

The University of Oxford is generally considered to have evidence of teaching as early as 1096, making it the oldest university in the English-speaking world. However, its exact founding date is unknown and vague. The university grew rapidly from 1167 when English students were banned from attending the University of Paris, leading to the establishment of Oxford as a major center of learning. The university was officially organized with a chancellor by 1225 and was granted a royal charter in 1248. The oldest colleges, University College, Balliol College, and Merton College, were founded between 1249 and 1264, marking the formal development of the university's collegiate structure.