Question: Anna Jagiellon, was Queen of Poland and Grand Duchess of Lithuania in her own right from 1575 to 1586, she was a daughter of Polish King Sigismund I the Old and his Italian wife, which member of the powerful House of Sforza, which ruled the Duchy of Milan since 1447?
Sentence (from "Anna Jagiellon"): Despite multiple proposals, she remained unmarried until the age of 52.
Relevant evidence: No