Question: When did Charles Of Saxony, Duke Of Courland's mother die?
Sentence (from "Charles of Saxony, Duke of Courland"): Prince Karl Christian Joseph of Saxony - in English, Charles of Saxony - (13 July 1733 – 16 June 1796) was a German prince of the House of Wettin and Duke of Courland and Semigallia.
Relevant evidence: No