Richard Karl Freiherr von Weizsäcker ( listen ( help · info ) ; born 15 April 1920 ) , known as Richard von Weizsäcker , is a German politician ( CDU ) .
Dr. Richard Freiherr von Weizsäcker listen ( info \* help ) ( born 15 April 1920 ) is a German politician , and a member of the CDU party .