Question: When did Frederick Of Saxony (Teutonic Knight)'s mother die?
Sentence (from "Frederick of Saxony (Teutonic Knight)"): Duke Frederick of Saxony (26 October 1473 – 14 December 1510), also known as Friedrich von Sachsen or Friedrich von Wettin, was the 36th Grand Master of the Teutonic Knights, serving from 1498–1510.
Relevant evidence: No