LONDON.- His Royal Highness The Prince Philip, Duke of Edinburgh celebrates his 90th birthday on 10 June 2011. To mark this occasion, a special exhibition is being shown in the Drawings Gallery at Windsor Castle, home to The Duke of Edinburgh, as Consort of Her Majesty The Queen, for nearly 60 years. Photographs, memorabilia, paintings and gifts have been selected from the Royal Collection and the Royal Archives, with around a third of the exhibits from The Duke’s own collection. They tell the story of His Royal Highness’s childhood and naval career, his marriage and family life, his work in support of The Queen as Patron or President through some 800 organisations, and his wide-ranging interests and achievements. Prince Philip was born on 10 June 1921 on the Mediterranean island of Corfu. A great-great-grandson of Queen Victoria, and a Prince of Greece and Denmark, he was the youngest of five children a