Peace of Alcoutim

Portugal [1371]

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June 18, 2026

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The Peace of Alcoutim, signed in 1371, was a treaty between Portugal and Castile. It was negotiated during a period of conflict stemming from disputes over the Castilian throne and Portugal's involvement in those disputes.12

Under the terms of the treaty, Portugal's King Ferdinand I was compelled to renounce his claim to Castilian territories and agree to marry his daughter to Henry II of Castile's son. However, Ferdinand I ultimately married Leonor Teles, which led to further complications and alliances with England against Castile. The treaty aimed to resolve immediate tensions but ultimately set the stage for future conflicts between the Iberian kingdoms.12

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Portugal
Disputes with Castile
…invaded Portugal, and, by the Peace of Alcoutim (1371), Ferdinand was forced to renounce his claim and to promise to marry Henry’s daughter; however, he instead took a Portuguese wife, Leonor Teles, despite the fact that she was already married and against the wishes of the commoners of Lisbon. In…
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…invaded Portugal, and, by the Peace of Alcoutim (1371), Ferdinand was forced to renounce his claim and to promise to marry Henry’s daughter; however, he instead took a Portuguese wife, Leonor Teles, despite the fact that she was already married and against the wishes of the commoners of Lisbon. In…
Read More