Question: When did Anna Wilhelmine Of Anhalt-Dessau's mother die?
Answer: 5 February 1745

She was the third (but second surviving) daughter of Leopold I, Prince of Anhalt-Dessau, by his morganatic wife Anna Louise Föhse. Anna Louise Föhse, Princess of the Holy Roman Empire (22 March 1677 in Dessau – 5 February 1745) was a German imperial princess. Born as a commoner to Rudolf Föhse, the court pharmacist in Dessau, and his wife, Agnes Ohme, she married Leopold I, Prince of Anhalt-Dessau and was later ennobled by Leopold I, Holy Roman Emperor