D. Pedro de Sousa Holstein (1781-1850), 1st Duke of Palmela was the Portuguese envoy to the Court of St. James from 1812-1817, 1825-1828 and 1838-1841. An able and important diplomat he represented Portugal at the Congress of Vienna. He was active in politics for the Constitutional cause during the Liberal Wars (1828-1834) and Minister of Foreign Affairs and Prime Minister. He was a friend of Beckford and the Prince Regent and was invited to Brighton Pavilion. He was present at the coronation of Queen Victoria in 1838.