Guillaume II des Pays-Bas
In 1843 he was appointed chief rabbi of the Grand Duchy of Luxembourg by King William II of the Netherlands. During this period he published his "Die Humanität als Religion." He took an active part in the annual rabbinical conferences held at Brunswick (1844), Frankfurt am Main (1845), and Breslau (1846). In 1844 he published his "Reform im Judenthum."