Undated file photo of King Konstantinos I of Greece, somewhere in Greece. On June 11th, 1917, he was forced to abdicate and go in exileand he was succeeded by his son Alexandros I. After his successor's death in 1920, Konstantinos returned to the throne on December 19th, 1920, after a plebiscite. On September 27th, 1922, he was once again forced to abdicate and was succeeded by his son, Giorgios II. He died on January 11th, 1923, in Palermo. (AP Photo)