Writ of Holy Roman Emperor Louis IV [Present-day Germany]: “Emperor Louis, the Bavarian, authorizes his chancellor, Hermann von Lichtenberg, to collect/demand all backdated taxes and past-due levies from all Jews in Germany in his name, and to keep a record and to establish new contracts (agreements to pay new taxes) with the Jews as he deems proper.” [Researcher’s note: The above is a translation of a German summary of the original Latin text both of which can be found in the cited source.]
Schaab, C[arl]. A[nton]: Diplomatische Geschichte der Juden zu Mainz. (Diplomatic history of Jew in Mainz.); (Mainz; 1855); Researched and Translated by Ziba Shadjaani 8/17/2020