Wertheimer was offered the office and title of Landesrabbiner of Hungarian Jewry for his aid in reestablishing communities and synagogues ravaged by warfare; the title was confirmed by the emperor and was the only one he used, though Moravia, Bohemia, and Worms accorded him similar honors. A scholar and patron of scholars, he financed the printing of the Babylonian Talmud undertaken at Frankfurt (1712–22) by his son-in-law, Moses Kann . Some of the sermons he delivered in the synagogue in his home have been preserved. He also left behind manuscripts that dealt with various aspects of halakhah, Midrash, and Kabbalah. He built a large synagogue in Eisenstadt and one in Nikolsburg. Judah *he-Ḥasid and his group were supported by Wertheimer, who bore the title of Nesi Ereẓ Israel and was in charge of the transfer of money collected throughout Europe to the Holy Land.