| Honorific Prefix: | His Excellency |
| Office: | German Ambassador to the United States |
| Term Start: | 1922 |
| Term End: | 1925 |
| Predecessor: | Karl Lang (as Chargé d'Affaires) |
| Successor: | Adolf Georg von Maltzan |
| Birth Name: | Otto Karl Ludwig Wiedfeldt |
| Birth Date: | 16 August 1871 |
| Birth Place: | Badel, Altmark, Germany |
| Death Place: | Essen, Germany |
| Alma Mater: | University of Leipzig |
| Parents: | Auguste Friederike Bley Karl Otto Wiedfeldt |
| Children: | Hermann Joachim Wiedfeldt |
Otto Karl Ludwig Wiedfeldt (16 August 1871 – 5 July 1926) was a German industrialist, statistician, politician and diplomat.
Wiedfeldt was born on 16 August 1871 in Thüritz (today known as Badel) in Altmark, Germany.[1] He was the son of Auguste Friederike (née Bley) Wiedfeldt and Karl Otto Wiedfeldt (1841–1915), a successful manufacturer. He was educated at the Gymnasium in Bernburg and Salzwedel before studying economics in Berlin (at the Studium der Nationalökonomie), later receiving his doctorate from the University of Leipzig.[2]
After graduation from university, Wiedfeldt was employed by the Statistical Office of the Ministry of the Interior. He later went to Japan as a representative of large German firms and acted as a commercial advisor to the Japanese Government. He served as a member of the Administrative Board of Essen for many years.[3] In 1908, he was appointed to a post within the Ministry of the Interior, and was responsible for drafting the 1911 Reich social insurance code (de|link=no|Reichsversicherungsordnung).[4]
From 1911 to 1914 he served as manager of the South Manchurian Railroad Company. After returning from Japan in 1914, he spent several months in the United States, learning about American manufacturing methods. At the beginning of World War I in July 1914, he joined the Reich's Wirtschafts Amt. where he became head of the Imperial Grain Office (de|link=no|Reichsgetreidestelle), developing a bread rationing program.[5]
In 1918, following the end of the War, he was appointed director of Krupp's, tasked with transforming the company's Essen works from a weapons manufacturer to peace time production.[6] Wiedfeldt, a vocal opponent of reparations,[7] served in this role until he was appointed to be the German Ambassador to the United States.
Upon America's entry into World War I in April 1917, U.S. President Woodrow Wilson immediately severed diplomatic relations with Germany and the country returned Ambassador Count Johann Heinrich von Bernstorff's passports. Following the end of the War, full diplomatic relations weren't restored until Wiedfeldt was installed as the new German Ambassador to the United States, presenting his letters of credence to President Warren G. Harding in May 1922. In his presentation, Wiedfeldt referred to himself as the Ambassador of the German Empire while Harding referred to Germany as the Republic of Germany.[8] While Ambassador, he negotiated a trade treaty[9] between Germany and the United States.[10] [11] In August 1923, he inspected the Albert Ballin, which was Germany's largest merchant marine ship, before it sailed to Hamburg from New York.[12]
During his tenure as ambassador, the Foreign Office had to deny his resignation several times, including in December 1923,[13] and February 1924 following his decision to leave the flag at the German Embassy at full-mast, rather than lowering it to half-mast upon the death of former President Wilson.[14] [15] Criticism of his decision led to further speculation of his recall before the announcement in August 1924 that he would officially retire on September 15, 1924.[16] Nevertheless, his retirement was postponed and he stayed in his post,[17] reportedly at the request of the German government until after the 1924 presidential election in America.[18] [19]
On January 31, 1925, he left his post, handing over leadership of the embassy to Counsellor Hans-Heinrich Dieckhoff, before he was officially succeeded by Baron Adolf Georg von Maltzan in February.[20] [21] As was often speculated,[22] [23] [24] following his retirement from the diplomatic service, he returned to Krupp's to help modernize the company, especially related to implementation of the Dawes Plan. He left the company for health reasons in May 1926, only to die two months later in July 1926.[2]
In 1896, Wiedfeldt married public school teacher Anna Bley (1867–1930),[25] a daughter of Dr. Gustave Bley of Bernburg.[26] [27] He owned a large country place in Mecklenburg.[16] Together, they were the parents of a son:
Dr Wiedfeldt died of leukemia on 5 July 1926 in Essen "after a long siege of blood metastasis".[30] [31] He was buried in the Meisenburg cemetery in Essen-Bredeney.[2]