Bologna convent, and may have listened to Irnerius. The publication of his Decretum from Bologna, by that time (cir. 1142) famous for jurisprudence, lent authority to this work, whose universal recognition was to enhance in turn Bologna's reputation.
From the time of this inception of juristic studies, the talents of the doctors, and the city's fame, drew a prodigious concourse of students from all the lands of western Europe. The Doctors of the Civil and Canon Laws organized themselves into one, and subsequently into two, Colleges. Apparently they had become an efficient association by the third quarter of the twelfth century. But the University of Bologna was to be constituted par excellence, not of one or more colleges of doctors, but of societies of students. The persons who came for legal instruction were not boys getting their first education in the Arts. They were men studying a profession, and among them were many individuals of wealth and consequence, holding perhaps civil or ecclesiastic office in the places whence they came. The vast majority had this in common, that they were foreigners, with no civil rights in Bologna. It behoved them to organize for their protection and mutual support, and for the furtherance of the purposes for which they had come. That a body of men in a foreign city should live under the law of their own home, or the law of their own making, did not appear extraordinary in the twelfth century. It was not so long since the principle that men carried the law of their home with them, had been widely recognized, and in all countries the clergy still lived under the law of the Church. The gains accruing from the presence of a great number of foreign students might induce the authorities of Bologna to permit them to organize as student guilds, and regulate their affairs by rules of their own, even as was done by other guilds in most Italian cities. At Bologna the power of Guelf and Ghibeline clubs, and of craftsmen's guilds, rivalled that of the city magistrates.
There is some indirect evidence that these students first divided themselves into four Nationes. If so, the arrangement did not last. For by the middle of the thirteenth century they are found organized in two Universitates, or corporations, a Universitas Citramontanorum and a Universitas
