Erich Bielka  Erich Bielka or Erich Bielka-Karltreu (born Ritter Bielka von Karltreu, May 15, 1908, Vienna, Austria - September 1, 1992, Bad Aussee, Styria) was an Austrian diplomat and member of the Austrian government. During his career, he served as Austrian ambassador in Bern, Cairo, Ankara and Paris and as Foreign Minister from 1974 to 1976.