No former German President is as well known and well-remembered as Richard Karl Freiherr von Weizsäcker. On April 15th, he celebrates his 90th birthday. He still speaks out sometimes on current affairs in Germany.His moving address in 1985, marking the anniversary of the end of World War Two, is unlikely ever to be forgotten. Von Weizsäcker remains outspoken to this day, and enjoys an international reputation. For ten years, he held the top office in Germany. We take a look back at his life.