Peter, Constable of Portugal

• Name — Peter of Coimbra Peter V of Aragon (disputed) • Title — Constable of Portugal; Count of Barcelona • House — Aviz • Father — Peter, Duke of Coimbra • Mother — Isabella of Urgell • Born — 1429 • Died — 30 June 1466 1429 • Place of death — Granollers • Burial Place — Santa Maria del Mar Church, Barcelona

Peter was the eldest son of Infante Peter, Duke of Coimbra and Isabella of Urgell. His father served as regent of the Kingdom of Portugal for Afonso V between 1439 and 1448. Peter inherited a claim to the Aragonese throne through his maternal grandfather James II, Count of Urgell, who was the last male descendant of the House of Barcelona and heir to the Crown of Aragon by the rights of agnatic primogeniture. • Illustration — Possible depiction of Peter in the Saint Vincent Panels.

In 1443, after the death of his cousin Infante Diogo and by the instigation of his father, Peter was elected the Constable of Portugal, enraging Afonso, Marquis of Valença, the son of his half-uncle Afonso, 1st Duke of Braganza, who believed the title was rightfully his. This political move, along with Afonso V's marriage to Isabella of Coimbra, Peter's sister, instead of the granddaughter of the Duke of Braganza, caused significant conflict between the two parties. In the same year, after the death of his uncle Ferdinand, Peter was granted the mastership of the order of Avis. In 1448, when King Afonso V of Portugal became of age and took reign, the Duke of Coimbra stepped down as regent. Afonso V, because of influence of the Duke of Braganza, who became the political enemy of Peter's father, voided all laws created under Coimbra's regency. Peter was stripped of both the constableship and the master of Avis. Intense disagreement and intrigue led to the Battle of Alfarrobeira, culminating in the death of Pedro and the exile of his children. Unlike his siblings, who went to the court of their aunt Isabella in Burgundy, Peter fled to Castile. Peter's exile in Castile constitutes the main period of his activity as a writer. Described as a disciple of Rodríguez de Padrón, he completed two projects, Satira de Infelice e Felice Vida and Tragédia de la insigne reina doña Isabel. The works are considered some of the earliest examples of sentimental fiction. In 1456 or 1457, Peter reconciled with King Afonso V and the Duke of Braganza, thus allowing him to return to Portugal and reclaim all his family's previous possessions. Upon his return, he participated in several of Afonso's expeditions to northern Africa.

In 1463, the Catalan institutions, which were in civil war with John II of Aragon, offered their crown to Peter. He was crowned King of Aragon, Count of Barcelona, and King of Valencia by the Consell de Cent. He reigned de facto in the Principality of Catalonia and parts of the Kingdom of Aragon, but only de jure in Valencia, which was occupied by John II of Aragon. The territory under his control only included Barcelona, most of Catalonia and parts of Aragon. With the support of his aunt Isabella, Duchess of Burgundy he became engaged to Margaret of York, sending her an engagement ring and a marriage contract. Margaret would later marry Isabella's son Charles the Bold.

• Illustration — Peter's tomb at the Santa Maria del Mar Church in Barcelona, Catalonia. After a period of ineffectual rulership, Peter died in 1466 of natural causes. He is buried in Church of Santa Maria del Mar in Barcelona, Catalonia. After his death, the Catalans offered the crown to René of Anjou.