Who married Eleonora Gonzaga, Duchess of Urbino?

Eleonora Gonzaga, Duchess of Urbino (31 December 1493 – 13 February 1570) was Duchess and for sometime regent of Urbino by marriage to Francesco Maria I della Rovere, duke of Urbino. She served as regent during the absence of her spouse in 1532.

Francesco Maria I della Rovere (25 March 1490 – 20 October 1538) was an Italian condottiero, who was Duke of Urbino from 1508 to 1516 and, after retaking the throne from Lorenzo II de' Medici, from 1521 to 1538.