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Portugal-UK 650

Portugal-UK 650 is an initiative to mark the 650th anniversary of the Anglo-Portuguese Alliance, the oldest diplomatic alliance in the world still in force.


The beginning of the formalization of the Alliance, based on the perpetual friendship between the two countries, occurred with the signing of the Treaty of Tagilde between King Fernando of Portugal and John of Gaunt on 10 July 1372. The Alliance was formally constituted by  the Treaty of Peace, Friendship and Alliance, sealed at St. Paul’s Cathedral, in London, on the 16 June 1373, by King Edward III of England and King Fernando and Queen Leonor. This alliance was renewed by the Treaty of Windsor of 1386.


As a legacy for the future, Portugal-UK 650 has three initiatives. First, to set up a commemorative plaque in St Paul’s Cathedral, in London, where the Treaty of Alliance of 1373 was signed. Second, to start a leadership development program for young people in the UK and Portugal, that will incorporate the founding values of the Anglo-Portuguese Alliance. Third, Portugal-UK 650 has the charitable aim to raise funds to initiate a project in Mozambique to help children in need, in partnership with ANDI – New Dialogue Organization. Mozambique is both a member of CPLP (Community of Portuguese Language Countries) and a member of the Commonwealth.


For more information about Portugal-UK 650, please see here.

For more information about the Treaty of Tagilde, please take a look at this video.

For more information about all of the treaties, please see the article here.