George I of Greece

George I (, "Geórgios I"; born Prince William of Schleswig-Holstein-Sonderburg-Glücksburg; ; 24 December 1845 – 18 March 1913) was King of Greece from 1863 until his assassination in 1913.
George's reign of almost 50 years (the longest in modern Greek history) was characterized by territorial gains as Greece established its place in pre-World War I Europe. He was the grandfather of Prince Philip, Duke of Edinburgh and great-grandfather of Charles III.
While out on an afternoon walk near the White Tower on 18 March 1913, he was shot at close range in the back by Alexandros Schinas, who was "said to belong to a Socialist organization" and "declared when arrested that he had killed the King because he refused to give him money". George died instantly, the bullet having penetrated his heart.