The Treaty of Brétigny was a treaty, drafted on 8 May 1360 and ratified on 24 October 1360, between King Edward III of England and King John II of France (the Good). In retrospect it is seen as having marked the end of the first phase of the Hundred Years' War (1337–1453)—as well as the height of English hegemony on the Continent.
It was signed at Brétigny, a village near Chartres, and later ratified as the Treaty of Calais on 24 October 1360.
The treaty was signed four years after John was taken as a prisoner of war at the Battle of Poitiers (19 September 1356). The ensuing conflicts in Paris between Étienne Marcel and the Dauphin (later King Charles V), and the outbreak of the Jacquerie peasant revolt weakened French bargaining power.
The exactions of the English, who wished to yield as few as possible of the advantages claimed by them in the abortive Treaty of London the year before, made negotiations difficult, and the discussion of terms begun early in April lasted more than a month.
By virtue of this treaty, Edward III obtained, besides Guyenne and Gascony, Poitou, Saintonge and Aunis, Agenais, Périgord, Limousin, Quercy, Bigorre, the countship of Gauré, Angoumois, Rouergue, Montreuil-sur-Mer, Ponthieu, Calais, Sangatte, Ham and the countship of Guînes. The king of England was to hold these free and clear, without doing homage for them. Furthermore, the treaty established that title to 'all the islands that the King of England now holds' would no longer be under the suzerainty of the King of France. The title Duke of Aquitaine was abandoned in favor of Lord of Aquitaine.