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Rosenberg was born on 12 January 1893 in Tallinn in the Russian Empire, the capital of modern Estonia, to a family of Baltic Germans. His father, Waldemar Wilhelm Rosenberg, was a wealthy merchant from Latvia, and his mother, Elfriede (nee Sire), was a teacher of French language in Tallinn. The Hungarian-Jewish journalist Franz Szell, who was apparently residing in Tilsit, Lithuania, spent a year researching in Latvian and Estonian archives before publishing in 1936 an open letter, with copies to Hermann Goring, Joseph Goebbels, German foreign minister Konstantin von Neurath, and others, accusing Rosenberg of having "no drop of German blood" flowing in his veins. Szell wrote that among Rosenberg's ancestors were only "Latvians, Jews, Mongols, and French."

In 1923, after the failed Beer Hall Putsch, Hitler, who had been imprisoned for treason, appointed Rosenberg as the leader of the National Socialist movement, a position he held until Hitler's release. Hitler remarked privately in later years that his choice of Rosenberg, whom he regarded as weak and lazy, was strategic; Hitler did not want the temporary leader of the Nazis to become too popular or hungry for power, because a person with either of those two qualities might not want to cede the party leadership after Hitler's release. However, at the time of the appointment Hitler had no reason to believe that he would soon be released, and Rosenberg had not appeared weak, so this may have been Hitler reading back into history his dissatisfaction with Rosenberg for the job he did. In 1929 Rosenberg founded the Militant League for German Culture. He later formed the "Institute for the Study of the Jewish Question," dedicated to identifying and attacking Jewish influence in German culture and to recording the history of Judaism from a radical nationalist perspective. He became a Reichstag Deputy in 1930 and published his book on racial theory The Myth of the Twentieth Century (Der Mythus des 20. Jahrhunderts) which deals with key issues in the National Socialist ideology, such as the "Jewish question." Rosenberg intended his book as a sequel to Houston Stewart Chamberlain's above-cited book. Despite selling more than a million copies by 1945, its influence within Nazism remains doubtful. It is often said to have been a book that was officially venerated within Nazism, but one that few had actually read beyond the first chapter or even found comprehensible. Hitler called it "stuff nobody can understand" and disapproved of its pseudo-religious tone. Rosenberg convinced Hitler that communism was an international threat due to the fragility of the Soviet Union's internal political structure. "Jewish-Bolshevism" was accepted as a target for Nazism during the early 1920s. In Rome during November 1932 Rosenberg participated in the Volta Conference. British historian Sir Charles Petrie met him there and regarded him with great distaste; Petrie was a Catholic and strongly objected to Rosenberg's anti-Jewish and anti-Catholic sentiments. The following year, once Hitler had become Chancellor, Rosenberg was named leader of the Nazi Party's foreign political office, but he played little practical part in the role. Another event of 1933 was Rosenberg's visit to Britain, intended to give the impression that the Nazis would not be a threat and to encourage links between the new regime and the British Empire. It was a notable failure. When Rosenberg laid a wreath bearing a swastika at the Cenotaph, a Labour Party candidate slashed it and later threw it in the Thames and was fined 40 shillings for willful damage at Bow Street magistrate's court. In January 1934 Hitler granted Rosenberg responsibility for the spiritual and philosophical education of the Party and all related organizations.

Are there any other interesting aspects about this article?
The following year, once Hitler had become Chancellor, Rosenberg was named leader of the Nazi Party's foreign political office,