After legendary heists and great escapes in history, we delve into the fascinating world of spies. Espionage, or the act of gathering intelligence, is as old as civilization itself. Here are twelve of the most famous spies in history, from Philip II and his global network of spies, to Richebourg, the spy who was 58 centimeters tall, or Mata Hari, to Ramón Mercader, Trotsky's assassin secret agent, or the Serbian-born agent who may have inspired the character of James Bond.