Cosimo de' Medici

Events

1

Episodes

3

Years

1552–1555

Every event in Historedia whose sources name Cosimo de' Medici, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

1. Surrender of Siena

   1552–1555

   Role: Duke of Florence

   1. 11552 · SienaSienese Alliance with France

      Siena expelled a local leader and allied with France in 1552, provoking Imperial response.

   2. 2January 1554 – April 1555 · SienaSiege of Siena

      The Florentine-Imperial army besieged Siena from January 1554 to April 1555.

   3. 3April 1555 · SienaSurrender of Siena

      Siena surrendered to Imperial forces in April 1555, ending the Republic.

Sources

1. Italian War of 1551–1559 Wikipedia, revision of 2026-08-22