Phase 3. 1560-1587
Cosimo, now established as the leader of the expanding Tuscan state, launched a legal battle to invalidate the decisions made in 1560 and to advance his own rights over the estate of the Medici family’s principal line. This initiative led in the early 1570s to an extensive review of the previous acts and agreements, but the issue was only fully resolved in 1589, long after Cosimo’s death. In that year, Caterina finally gave the ownership of the Medici estate as a gift to the new Grand Duke, Ferdinando de’ Medici, who then married her granddaughter Christina of Lorraine.
Agnolo Bronzino, Portrait of Cosimo de’ Medici, c. 1545, Art Gallery of New South Wales