onwards, although there were some notable exceptions (e.g., neither Oxford nor Padua received this right, but they were nonetheless universally considered "Studia Generalia by custom"). Modern historians have tended to focus on the first three requirements (students from everywhere, at least one higher faculty, teaching by masters). This has led to contention in making lists of Medieval universities. Some Italian universities, for instance, were quick to obtain papal charters and thus the privileges and title of a studium generale, but their student catchment never went much beyond the local district or they had only a couple of masters engaged in teaching. Other comparable schools (notably the more prestigious cathedral schools of France), may have had wider student catchment and more masters, but neglected or failed to secure the chartered privileges and thus were never referred to as studia generalia. It is common to include the former and exclude the latter from lists of "Medieval universities", but some historians have disputed this convention as arbitrary and unreflective of the state of higher learning in Europe. Some historians have discarded the studium generale definition, and come up with their own criteria for a definition of a "university"—narrowing it by requiring, for instance, that a university have all three higher faculties (Theology, Law, Medicine) in order to be considered a "Medieval university" (very few had all three), whereas others widen it to include some of the more prestigious cathedral schools, palace schools and universities outside of Latin Europe (notably in the Greek and Islamic world, for example the Pandidakterion founded by the Byzantine emperor Theodosius II in 425 or University of al-Qarawiyyin in Morocco founded by Fatima al-Fihri in 859, which may be the "first university in the world and the oldest existing, and continually operating educational institution in the world"). There is also contention on the founding dates of many universities. Using the date of acquisition of a papal and royal/imperial charter is inadequate, as the older universities, believing their status and reputations sufficient and indisputable, refused or resisted asking for an official charter for a long time. Some historians trace the founding of a university to the first date when evidence of some kind of teaching was done in that locality, even if only local and limited. Others wait until there is evidence of higher learning, a wide student catchment, the emergence of its masters teaching elsewhere or a more definitive