The transcription of the corpus of the Chapter's scrolls of Aquileia, held in Udine, will certainly in the future to clarify many points still obscure in its evolution. Still lacks a history of this institution: in recent years have been developed some respects, such as the reconstruction of the jurisdictions and heritage of the institution or the control's strategies by the noble families. Poppo ""refounded"" the Chapter, but certainly not established it ex nihilo. In a text of Paul the Deacon we can assume that 25 canons lived together with the Patriarch already in Cormons. The Popponian donation, which confirms previous gifts and assigns new goods, was part of a project of also urban renewal of Aquileia. Perhaps even arose then Chapter of Cividale: this would deserve further investigation. They were manifested the need for joint management of the Chapter' revenues and the will, severa! times repeated, of the common life of the canons. In 1090 the Chapter obtains jurisdiction on its assets, with the right to extend it to further acquisitions. On the one hand the Patriarchs took the Chapter functional to their domain needs, they al so were influenced by Gregorian trends and canons of St. Augustine; the Chapter became organic to the Foroiulian government and the Chapter's school formed the closest employees of the Patriarch. But the common management of the assets bit the interests of the feudal class, - members of which found comfortable reap the benefits and annuities Chapter - raising strong reactions especiall y at the end of the twelfth century. The thirteenth century was the moment of maximum splendor of the Chapter as land lordship, but marked a crisis of livelihoods, faced with new donations and the reduction in the number of prebendaries. From the middle of the fourteenth century, it regained its independence, carrying out supply function during the Patriarch's vacancy. This also led to conflict with the Patriarch, eg. at the time of Bertrand de Saint-Genies . Since then, the presence of the Chapter in Aquileia - albeit fora short time and with limited functions - was an anomaly, given that the Patriarch resided permanently in Udine until the beginning of the fifteenth century. At the end of the fourteenth century, the Chapter resigned the prerogative of the patriarchal election, now held by the Roman Curia. After the end of the patriarchal state (1420) the role of the Chapter was reduced. lndeed, in the sixteenth century the canons had to endure the oppression of the Imperials. The abolition of the Patriarchate marked the end of the Chapter, summed up by Udine's Collegiate, that was the intention of the Patriarchs since the mid-fourteenth century.