sung by a choir of boys, and prayers in German were added to those in Hebrew and Aramaic. He also had a pipe organ installed. Though not unheard of in synagogues before, its subsequent association with the new movement would later anathemize the organ in the eyes of the Orthodox in Central Europe (albeit it was introduced, without controversy, in France and Italy). The progressive nature of his views was further shown by his strong advocacy of the introduction of confirmation. In the Seesen temple it was Jacobson himself who confirmed the first five Jewish boys. When, under Napoleon's rule, the Kingdom of Westphalia was created, and the emperor's brother Jérôme Bonaparte was placed at its head, Jacobson, who had removed to the residence of the king at Cassel, was appointed president of the Jewish consistory (), established on 3 March 1808. In his capacity as consistorial president, assisted by a board of officers, he did his best to exercise a reforming influence upon the various congregations of the country. He also advocated a seminary for the training of Jewish teachers. A double portrait of him and his first wife Mink Samson, painted by the Jewish court-painter Salomon Pinhas (ca. 1808) is at the European Art collection of the Israel Museum, Jerusalem. Jacobson's innovations were quite restrained, and more importantly his mode of thought was still within a traditional framework. He justified himself on conventional halachic grounds, later enlisting scholars to write responsa in favour of his worship style. His role in the introduction of these early reforms made him a founding figure in the eyes of some partisans of Reform Judaism, but Michael A. Meyer noted that he lacked either a comprehensive approach or a sense of principled critique. His religious worldview, according to Meyer, did not stray beyond that of late maskilim; he "was not a conscious Reformer", interested in modifying religious mechanisms themselves, only exteriors. While his associates, mainly Eduard Kley, would later publish the first unequivocal Reform liturgy in 1818, effecting a concerted Orthodox backlash, the Westphalian Consistory's aroused little ire at their time. Its reforms were adopted by German neo-Orthodoxy, and Rabbi Samson Raphael Hirsch "integrated fully into his worldview the program of the moderate Haskalah and even the aesthetic reforms of the Westphalian consistory." After the Duchy of Mecklenburg-Schwerin emancipated its Jewish subjects in 1813, Jacobson bought in that duchy two feudal manor estates,