Question: What is the date of death of Archduchess Gregoria Maximiliana Of Austria's mother?
Sentence (from "Maria Anna of Bavaria (1551–1608)"): Maria Anna of Bavaria (21 March 1551, Munich – 29 April 1608, Graz) was a politically active Archduchess of Austria by marriage to Archduke Charles II of Austria.
Relevant evidence: Yes