The city of Pordenone, which was a kind of island, with estates of German families, including the Babenbergs and the Habsburgs, belonged to the jurisdiction of the Prata, Porcia and Brugnera on several occasions, from 1254 to 1258 and from 1314 to 1351. After the conflict with the Venetians the castle of Prata was destroyed because the restricted merchant oligarchy that governed Venice already started in 1300 a policy of expansion on the mainland.

The greatest impulse to conquer the hinterland was given by the Doge Francesco Foscari in the early years of 400. This decision was considered robust by the Venetians to give breath to a besieged city; in fact a synchronism between there Turkish expansion westward with the Venetian on the mainland can be seen; the Venetian - Friulian properties render a lot much to the Venetians. In the new territories, interesting for agriculture and factories, in fact Venice could trade overseas products. The conquest served to compensate for the positions lost in the East and to prevent the formation of a big state behind it, furthermore in this way the Republic was granted with a free access to the trade routes that, through the Alps, put it in relation to central and northern Europe. In 1420, the Venetian conquest of Friuli was completed and the Patriarchate had no longer a political function. When the Venetians try to conquer Friuli, at first, the Prata and the Porcia families lined up with them. Then they decided to replace their allied and lined up with Lodovico di Teck, supported by Sigismondo of Hungary because they could not suffer the despotism of the Serenissima anymore. After alternate vicissitudes during the war, in the end, the Venetians got the upper hand. And Filippo Arcelli, who was in charge, was commissioned to proceed with the revenge against the rebel feudal lords of Friuli. In September 1419 he besieged the castle of Prata. The orders given by Venice were peremptory: the total destruction and ruin Prata’s land, so that in the future it would be no longer inhabited and people could say "hic fuit Prata".

The fate of Counts William and Nicholas was marked. After a tenacious resistance, especially by Nicolò, the castle will be taken and destroyed up to the foundations. The territory was put to fire and steel, even the banks of the river were destroyed, so that water could make the country uninhabitable, bell towers and any other building except churches were demolished. The branch of the Porcia and Brugnera family accepted submission to the Republic of Venice avoiding destruction and from that moment on, they distinguished themselves being "people of arms" at the service of the Serenissima.

Under the rule the domination of Venice, the Friuli regained greater political and economic stability and the arts had a new impetus, even if not up to other Italian courts. In the Porcia family, a few men of letters stood out, among whom Jacopo (1462-1538) did it, who was an important figure, achieving notoriety as humanist. He aroused interest in a particularity, he was the first among the castellans of Friuli who, impatient with the inertia in which, the changed political conditions of the country obliged men of his class who sought in study and culture, while remaining laic found a reason to live. Jacopo, born in the castle of Porcia, son of Artico and Francesca Padovani of Colloredo, was educated without particular dedication to the study of letters, but he had dedicated himself to games of chivalry and to exercise of weapons and to hunting.

It was only later that he took the books, after some family misfortunes, as the loss of his wife and father, after he left the administration of his possessions to his mother, that he went to Padua where he graduated in Law in 1509. In that same year, his mother also passed away and had to return to Porcia to prepare for the imminent war. Venice, had taken advantage from the debacle of Cesare Borgia to expand to the detriment of the state of the Church in Romagna, occupying Ravenna and Cervia, and did not want to adhere to the 'invitation of the energetic Pope Julius II to return the stolen properties. This event led to the union in a league that will be called Cambrai (1508) where almost all the states that had bone to pick with the Venetians: France, Spain and the Empire. Hardly defeated at Agnadello (1509) by the French, Venice was forced to yield to France Cremona and Chiara d’Adda, Ravenna to the Pope, the ports of Puglia (which Venice had taken at the time of the descent of Charles VIII of France) to the Spain. Only with the Emperor Maximilian Venice resisted and gave nothing back. Not even Pordenone, which since then has been under Venetian rule.