Fernando Afonso de Albuquerque, alcaide da Guarda - Treaty of Windsor (1386)

Negotiators: Fernando Afonso de Albuquerque, Lourenço João Fogaça, Richard d'Alberbury, John Clanowe and Richard Ronhale.

Fernando Afonso de Albuquerque, alcaide da Guarda

Lourenço Anes Fogaça, Chanceler Mor do Reino

The Treaty of Windsor was a diplomatic alliance signed between Portugal and England on May 9, 1386, in Windsor 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. 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. The Treaty of Windsor established a pact of mutual support between the countries.

This document is preserved at the Portuguese National Archives.

Historian Matthew Winslett says, "This treaty has been the cornerstone of both nations' relations with each other ever since."

Enduring to this day, the Treaty of Windsor holds the record as the longest-lasting diplomatic treaty in recorded history.

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https://en.wikipedia.org/wiki/Treaty_of_Windsor_(1386)

https://www.britannica.com/topic/Treaty-of-Windsor

https://en.wikipedia.org/wiki/Fernando_Afonso_de_Albuquerque

https://history.blog.gov.uk/2016/05/09/historys-unparalleled-allian...

https://en.wikipedia.org/wiki/Timeline_of_Portuguese_history_(Secon...