Ulrich von Brockdorff-Rantzau

Ulrich Karl Christian Graf von Brockdorff-Rantzau (29 May 1869 – 8 September 1928) was a German diplomat who became the first Foreign Minister of the Weimar Republic. In that capacity, he led the German delegation at the Paris Peace Conference but resigned over the signing of the Treaty of Versailles. He was also the German ambassador to the Soviet Union from 1922 to 1928. Provided by Wikipedia