“Imperial Letter of Protect” Issued by the Friedrich II [Present-day Germany] [Unconfirmed]
Commentary from other sources:
1) “In an imperial Letter of Protection in the year of 1236, Friedrich II finally institutionalizes the notion that all Jews are to be considered ‘chamber servants’ (servitus camere imperialis).”
Demel, Michael: Gebrochene Normalität, S. 51