The Duke and Duchess will stay in Portugal from 1 to 3 June to celebrate the enduring historical ties and modern relationship between the UK and Portugal.

According to the press release, “the visit will mark the 640th anniversary of the Treaty of Windsor, which underpins the world’s oldest diplomatic alliance.”

The Duke and Duchess of Edinburgh will be travelling around Lisbon and Porto, undertaking “engagements in support of issues important to Their Royal Highnesses, including youth opportunity, sports inclusion and Women, Peace and Security.”

The same note also expresses that the programme “will include visits to historic sites reflecting UK–Portugal heritage, alongside meetings with students, community organisations, and highlighting innovative partnerships.”

History background

According to the information provided, this is the first Royal visit by the British monarchy to Portugal since 2011, by the current King and Queen of the United Kingdom, previously known as the Prince of Wales and Duchess of Cornwall.

The Duke and Duchess of Edinburgh were in Portugal for the last time in May 2005.