Count of Barcelona in the context of "Principality of Catalonia"

Peter III of Aragon (In Aragonese, Pero; in Catalan, Pere; in Italian, Pietro; c. 1239 – 11 November 1285) was King of Aragon, King of Valencia (as Peter I), and Count of Barcelona (as Peter II) from 1276 to his death. At the invitation of some rebels, he conquered the Kingdom of Sicily and became King of Sicily (as Peter I) in 1282, pressing the claim of his wife, Constance II of Sicily, uniting the kingdom to the crown.

The County of Barcelona (Latin: Comitatus Barcinonensis, Catalan: Comtat de Barcelona) was a polity in northeastern Iberian Peninsula, originally located in the southern frontier region of the Carolingian Empire. In the 10th century, the Counts of Barcelona progressively achieved independence from Frankish rule, becoming hereditary rulers in constant warfare with the Islamic Caliphate of Córdoba and its successor states. The counts, through marriage, alliances and treaties, acquired or vassalized the other Catalan counties and extended their influence over Occitania. In 1164, the County of Barcelona entered a personal union with the Kingdom of Aragon. Thenceforward, the history of the county is subsumed within that of the Crown of Aragon, but the city of Barcelona remained preeminent within it.

Within the Crown, the County of Barcelona and the other Catalan counties progressively merged into a polity known as the Principality of Catalonia, which assumed the institutional and territorial continuity of the County of Barcelona.

James I the Conqueror (Catalan: Jaume I or Jaume el Conqueridor; Aragonese: Chaime I o Conqueridor; 2 February 1208 – 27 July 1276) was King of Aragon, Count of Barcelona, and Lord of Montpellier from 1213 to 1276; King of Majorca from 1231 to 1276; and King of Valencia from 1238 to 1276. His long reign of 62 years is not only the longest of any Iberian monarch, but one of the longest monarchical reigns in history, ahead of Hirohito but remaining behind Queen Elizabeth II, Queen Victoria, and Ferdinand I of the Two Sicilies and King Louis XIV

King James I saw the expansion of the Crown of Aragon in three directions: Languedoc to the north, the Balearic Islands to the southeast, and Valencia to the south. By a treaty with Louis IX of France, he achieved the renunciation of any possible claim of French suzerainty over the County of Barcelona and the other Catalan counties, while he renounced northward expansion and taking back the once Catalan territories in Occitania and vassal counties loyal to the County of Barcelona, lands that were lost by his father Peter II of Aragon in the Battle of Muret during the Albigensian Crusade and annexed by the Kingdom of France, and then decided to turn south. His great part in the Reconquista was similar in Mediterranean Spain to that of his contemporary Ferdinand III of Castile in Andalusia. One of the main reasons for this formal renunciation of most of the once Catalan territories in Languedoc and Occitania, and any expansion into them, is that he was raised by the Knights Templar Crusaders, who had defeated his father, who was fighting for the Pope alongside the French. It was thus effectively forbidden for him to try to maintain the traditional influence of the Count of Barcelona that previously existed in Occitania and Languedoc.

Martin the Humane (29 July 1356 – 31 May 1410), also called the Elder and the Ecclesiastic, was King of Aragon, Valencia, Sardinia and Corsica and Count of Barcelona from 1396 and King of Sicily from 1409 (as Martin II). He failed to secure the accession of his illegitimate grandson, Frederic, Count of Luna, and with him the rule of the House of Barcelona came to an end.

Ramon Berenguer IV (Catalan pronunciation: [rəˈmom bəɾəŋˈɡe]; c. 1114 – 6 August 1162, Anglicized Raymond Berengar IV), sometimes called the Saint, was the count of Barcelona and the de facto ruler of Aragon who brought about the union of the County of Barcelona with the Kingdom of Aragon to form the Crown of Aragon.

James II (Catalan: Jaume II; Aragonese: Chaime II; 10 April 1267 – 2 or 5 November 1327), called the Just, was the King of Aragon and Valencia and Count of Barcelona from 1291 to 1327. He was also the King of Sicily (as James I) from 1285 to 1295 and the King of Majorca from 1291 to 1298. From 1297 he was nominally the King of Sardinia and Corsica, but he only acquired the island of Sardinia by conquest in 1324. His full title for the last three decades of his reign was "James, by the grace of God, king of Aragon, Valencia, Sardinia and Corsica, and count of Barcelona" (Latin: Iacobus Dei gratia rex Aragonum, Valencie, Sardinie, et Corsice ac comes Barchinone).

Born at Valencia, James was the second son of Peter III of Aragon and Constance of Sicily. He succeeded his father in Sicily in 1285 and his elder brother Alfonso III in Aragon and the rest of the Spanish territories, including Majorca, in 1291. In 1295 he was forced to cede Sicily to the papacy, after which it was seized by his younger brother, Frederick III, in 1296. Two years later rom Pope Boniface VIII returned the island to the king of Majorca along with rights to Sardinia and Corsica. On 20 January 1296, Boniface issued the bull Redemptor mundi granting James the titles of Standard-bearer, Captain General and Admiral of the Roman church.

Alfonso II (1–25 March 1157 – 25 April 1196), called the Chaste or the Troubadour, was the King of Aragon and, as Alfons I, the Count of Barcelona from 1164 until his death. The eldest son of Count Ramon Berenguer IV of Barcelona and Queen Petronilla of Aragon, he was the first King of Aragon who was also Count of Barcelona. He was also Count of Provence, which he secured from Douce II and her would-be father-in-law Raymond V, Count of Toulouse, from 1166 until 1173, when he ceded it to his brother, Ramon Berenguer III. His reign has been characterised by nationalistic and nostalgic Catalan historians as l'engrandiment occitànic or "the Pyrenean unity": a great scheme to unite various lands on both sides of the Pyrenees under the rule of the House of Barcelona.