In 1806, Friesenhausen was the first to advocate the establishment of a rabbinical seminary in Hungary, and for this purpose prepared a plan which he submitted to Archduke Joseph, Palatine of Hungary.
In 1806, began to advocate for the establishment of rabbinical seminaries in Hungary, Galicia, and Bohemia. Fresienhausen was the first to make such a proposal and submitted his plan to the Archduke Joseph, Palatine of Hungary.