Treaty of Windsor (1386)
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The Treaty of Windsor is a diplomatic alliance signed between the Kingdom of Portugal and the Kingdom of England on 24 February 1387 in Windsor, Berkshire, and sealed by the marriage of King John I of Portugal (House of Aviz) to Philippa of Lancaster, daughter of John of Gaunt, 1st Duke of Lancaster.[1] With the victory at the Battle of Aljubarrota, assisted by English archers, John I was recognised as the undisputed King of Portugal, putting an end to the interregnum of the 1383–1385 Crisis.[1] The Treaty of Windsor established a pact of mutual support.[1]
Copies are preserved at the Torre do Tombo National Archive in Lisbon and The National Archives in London.[2][3]
The historian Matthew Winslett says, "This treaty has been the cornerstone of both nations' relations with each other ever since."[4] Still in effect today, it is the longest-lasting diplomatic treaty in recorded history.[5]
See also
- Anglo-Portuguese Treaty of 1373
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- Timeline of Portuguese history
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- Operation Alacrity
References
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- ↑ BBC History Revealed magazine; May 2023 issue; p. 15
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Bibliography
- Country profile of Portugal, Template:Webarchive Foreign, Commonwealth and Development Office website
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