The French king, as the heir of Charlemagne, renounced feudal overlordship over the counties the March of Hispania part of the March of Gothia that remained within the geographical area that later became known as Catalonia.
James I renounced claims to Fenouillet-du-Razès and Peyrepertuse, with the castle of Puilaurens, the castle of Fenouillet, the Castellfisel, the castle of Peyrepertuse and the castle of Quéribus; moreover he renounced his feudal overlordship over Toulouse, Saint Gilles, Quercy, Narbonne, Albi, Carcassonne (part of the County of Toulouse since 1213), Razès, Béziers, Lauragais, Termes and Ménerbes (enfeoffed in 1179 to Roger III of Béziers); to Agde and Nîmes (their viscount was recognized as the feudatory of the Counts of Barcelona from 1112), and Rouergue, Millau and Gévaudan (derived from the inheritance of Douce of Provence). Under his lordship remained the viscounty of Carlat and the lordship of Montpeller with the barony of Aumelas.
The renunciation of the feudal rights of the King of Aragon over the County of Foix, initially included in the treaty, was rejected by the king of Aragon on ratifying the document on 16 July 1258, on the grounds that it was not under the overlordship of the king of France.
On 17 July, the Aragonese king renounced his hereditary rights to the County of Provence (then an imperial fief) in favor of Margaret, daughter of his uncle Ramon Berenguer IV, Count of Provence (died in 1245) and wife of the French king.
The direct consequence of the treaty was to definitively separate the House of Barcelona from the politics of today's southern France and so, causing the strong cultural and economic ties of the region that became Catalonia with Languedoc to fade progressively. A secondary effect is that it allowed the transfer of Provence to the Capetian House of Anjou, and after extinction of that house, its incorporation into France.
- Joseph de Laborde, Layettes du Trésor des chartes, vol. 3 (Paris: E. Plon, 1875), pp. 405ff.
- Engels, Odilo. "Der Vertrag von Corbeil (1258)." Gesammelte Aufsätze zur Kulturgeschichte Spaniens 19 (1962): 114–46.
- The Worlds of Alfonso the Learned and James the Conqueror - Robert I. Burns, S.J., ed.
- The Crusader Kingdom of Valencia - Robert Ignatius Burns, S.J.
- (French) The Corbeil Treaty on the Roussillon History site
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