Republic of Florence (1115–1532)

1. Florence forms a self-governing commune

   Jan 1, 1115Labels: Florence Commune

   Following the death of Matilda of Tuscany, Florence increasingly governed itself through communal institutions, marking an early phase of the city’s republican tradition.

   • Britannica 1911
   • Wiki FR

2. Florence defeated at the Battle of Montaperti

   Sep 4, 1260Labels: Battle of, Siena

   Florence suffered a major defeat by Siena at Montaperti, a watershed in Tuscan Guelf–Ghibelline struggles that reshaped internal Florentine politics and alliances.

   • Wikipedia

3. Florence wins the Battle of Campaldino

   Jun 11, 1289Labels: Battle of, Arezzo

   Florentine Guelf forces and allies defeated Arezzo at Campaldino, helping secure Guelf dominance in Tuscany and strengthening Florence’s regional position.

   • Britannica

4. Ordinances of Justice promulgated in Florence

   Jan 15, 1293Labels: Ordinances of

   The Ordinances of Justice established a guild-dominated constitutional order and curtailed magnate political power, becoming a cornerstone of Florentine republican governance.

   • Britannica
   • InternetCulturale

5. Giano della Bella forced into exile

   Jan 1, 1295Labels: Giano della

   Popular leader Giano della Bella—associated with the Ordinances of Justice—was driven from Florence amid backlash from elite factions, signaling the fragility of popular reform within the republic.

   • Britannica

6. Black Death strikes Florence

   Mar 1, 1348Labels: Black Death, Florence

   The plague reached Florence in 1348, causing severe demographic and economic disruption and reshaping social and labor conditions in the republic.

   • Wikipedia

7. Ciompi Revolt erupts among textile workers

   Jun 1, 1378Labels: Ciompi Revolt, textile workers

   Disenfranchised laborers (notably wool workers) rose in revolt, briefly forcing political concessions and highlighting tensions in Florence’s guild-based republican system.

   • Wikipedia

8. Florence conquers and annexes Pisa

   Jan 1, 1406Labels: Pisa, Florence

   Florence’s capture of Pisa ended a long conflict and expanded Florentine territorial power, strengthening the republic’s dominance in Tuscany.

   • Wikipedia

9. Cosimo de’ Medici consolidates power in Florence

   Jan 1, 1434Labels: Cosimo de', Medici

   Cosimo de’ Medici’s return and ascendancy marked the beginning of sustained Medici dominance, while republican offices formally continued to exist under increasingly oligarchic control.

   • Wikipedia

10. Pazzi conspiracy attempts to topple the Medici

    Apr 26, 1478Labels: Pazzi Conspiracy, Medici

    A failed assassination attempt during Mass targeted Lorenzo and Giuliano de’ Medici; its collapse strengthened Medici authority and intensified Florentine conflict with papal allies.

    • Britannica

11. Medici expelled; Charles VIII enters Florence

    Nov 17, 1494Labels: Charles VIII, Medici expulsion

    Amid the French invasion of Italy, the Medici were driven out; soon after, King Charles VIII made a ceremonial entry into Florence, inaugurating a renewed republican phase under external pressure.

    • WGA

12. Savonarola executed in Piazza della Signoria

    May 23, 1498Labels: Girolamo Savonarola, Piazza della

    Girolamo Savonarola, influential during Florence’s theocratic-republican interlude, was executed—ending his regime and reshaping the city’s political-religious landscape.

    • Britannica
    • History Today

13. Piero Soderini elected gonfaloniere for life

    Jan 1, 1502Labels: Piero Soderini, Gonfaloniere

    To stabilize republican government, Florence made the gonfaloniere a lifetime office and chose Piero Soderini—an institutional experiment echoing other Italian republics’ “doge-like” leadership models.

    • Wikipedia

14. Medici restored to Florence after 1512 upheaval

    Jan 1, 1512Labels: Medici Restoration, 1512

    The Medici returned to power in Florence (ending Soderini’s rule) and re-established dominance that would culminate in the republic’s transformation into a hereditary principality.

    • MetMuseum
    • RCT

15. Republic restored after the Sack of Rome

    May 1, 1527Labels: Republic Restoration, Sack of

    After Rome was sacked by imperial troops, revolution in Florence forced Medici authorities to flee and restored a republican regime amid the wider Italian Wars.

    • Britannica

16. Siege of Florence ends in capitulation

    Aug 10, 1530Labels: Siege of, Imperial papal

    Imperial–papal forces besieged Florence for months; the city surrendered in August 1530, paving the way for Medici reinstallation and the eclipse of republican independence.

    • Wikipedia
    • Britannica

17. Florentine constitution establishes hereditary dukedom

    Apr 27, 1532Labels: Florentine Constitution, Alessandro de'

    A new constitutional settlement transformed Florence from a republic into a hereditary duchy, naming Alessandro de’ Medici hereditary duke and ending the republic’s institutional era.

    • Britannica
    • Wikipedia