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Born at Portogruaro, he studied law at the University of Padua, and worked in the papal administration. From 1393 he was bishop of Concordia, and in 1402 Patriarch of Aquileia. The following year he was able to obtain the palatine title of the castle of Zoppola. This caused a crisis with the other Friulian nobles, after which Panciera followed a pro-Venetian policy, leading the people of Cividale del Friuli to ask his removal to Pope Gregory XII. On 31 June 1408 he was therefore replaced as patriarch by Antonio di Ponte, but, with the support of some cardinals who opposed Gregory, he obtained his reinstatement at the Council of Basel.
In 1411 he was elected cardinal by John XXIII in order to free the Aquileian throne to Louis of Teck, a nobleman whose German allegiances were useful for the antipope. Pancieri remained in Friuli, but in 1412 he was forced to flee. In 1414 he took part in the Council of Constance, being among the accusators of Gregory XII. In 1417 he participated in the election of Pope Martin V, who made him administrator of Satriano and then of Frascati (1420). Later Panciera became abbot of Concordia, but never moved there.
He died in 1431 and was buried in the Vatican grottoes under St. Peter's Basilica.
- Miranda, Salvador. "PANCIERA, Antonio (ca. 1350–1431)". The Cardinals of the Holy Roman Church. Florida International University.