Writ of King Richard [Present-day Germany]: “[…] Furthermore, the Jews of Worms and King Richard have come to an agreement in that Jews may remain [there] irrevocably for the next six consecutive years beginning in 69, [for which they are to give] 200 Mark silver annually and [give…] Raugrave Ruprecht [II.], the brother of the Bishop of Worms, 20 Mark annually on Walpurgis night (May 1) in fief.” [Researcher’s note: The above is a translation of a German summary of the original Latin text which can be found in the cited source.]
Spiker, Christian Wilhelm: Ueber die ehemalige und jetzige Lage der Juden in Deutschland (Regarding the former and current circumstances of Jews in Germany.); (Halle; 1809); Researched and Translated by Ziba Shadjaani 7/10/2020