Andrea Sunyer cittadino di Cagliari e corsaro nella guerra luso-castigliana (1475-1476)

This study introduces Andrea Sunyer, leader of the 15th-century Sardinian-Catalan aristocracy from in Cagliari, capital of the Kingdom of Sardinia, and describes his activity as corsair at the service of Jaime II, King of Aragon, during the Portuguese- -Castilian war for succession to the throne of Castile. Sunyer's commitment during the Aragonese king's military campaign in Portugal contributed decisively to his social rising; for this reason, he was to later be appointed Veguer of Cagliari. This study emphasizes, on the one hand, how the Kingdom of Sardinia and the other States that constituted the Kingdom of Aragon were involved in the king's Iberian policies; and, on the other hand, how the Sardinian-Catalan merchants, who were highly active in western Mediterranean seaports, also extended their activity to Portuguese seaports.