Question: What is the date of birth of Bianca Cappello's husband?
Sentence (from "Francesco I de' Medici, Grand Duke of Tuscany"): Francesco I (25 March 1541 – 19 October 1587) was the second Grand Duke of Tuscany, ruling from 1574 until his death in 1587, a member of the House of Medici.
Relevant evidence: Yes