The University of Pisa is a public institution boasting twenty departments, with high level research centres in the sectors of agriculture, astrophysics, computer science, engineering, medicine and veterinary medicine. Furthermore the University has close relations with the Pisan Institutes of the National Board of Research, with many cultural institutions of national and international importance, and with industry, especially that of information technology, which went through a phase of rapid expansion in Pisa during the nineteen sixties and seventies. The University of Pisa was officially established in 1343, although a number of scholars claim its origin dates back to the 11th century. The earliest evidence of a Pisan "Studium" dates to 1338, when the renowned jurist Ranieri Arsendi transferred to Pisa from Bologna. He along with Bartolo Da Sassoferrato, a lecturer in Civil Law, were paid by the Municipality to teach public lessons. The papal bull 'In supremae dignitatis', granted by Pope Clement VI on 3 September 1343, recognized the 'Studium' of Pisa as a 'Studium Generale'; an institution of further education founded or confirmed by a universal authority, the Papacy or Empire. Pisa was one of the first European universities that could boast this papal attestation, which guaranteed the universal, legal value of its educational qualifications.