On this day in 1386 – England and Portugal formally ratify their alliance with the signing of the Treaty of Windsor, making it the oldest diplomatic alliance in the world which is still in force.

5 comments

1. The Treaty of Windsor is the diplomatic alliance signed between Portugal and England on 9 May 1386 at 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.

   The Treaty of Windsor established a pact of mutual support between the countries.

2. The Aulder Alliance

3. It’s rather easy to tell the Portuguese from the English in that painting 😅

4. Happy Europe Day! 😀

5. UK + Portugal = ❤️