Prince Philip's birth certificate is unearthed after lying buried for 99 years in an archive close to the Greek villa where he was born Document was written by hand in Katharevousa Greek, a purist version of modern Greek, by priest named Spiriodon Tryfonas on island of Corfu Found in municipal archive housed in old British Army barracks that sits within the imposing Venetian fortress overlooking Corfu's Old Town Details how Prince Andrew of Greece, Philip's father, presented baby boy to priest, which he said had been born at 10am on May 28, 1921 Philip was actually born on June 10, 1921 but experts say his birth was registered using old Julian calendar, still being used in Greece in early 20th Century