The Tree of Europe · Person
Gian Galeazzo Visconti
«the Count of Virtù»
The first Visconti Duke of Milan. Through war, diplomacy and territorial purchases, he built a dominion that aspired to become the leading power in northern Italy.
This complete profile is available in English. Bibliographic titles retain their original language. Links marked ES open the Spanish edition.
Key details
Birth: 1351 Documented
Death: 1402 Documented
Role: Duke
Dynasty: Visconti
Territories: Milan (ES)
Recorded governments and reigns
Duke · Milan · Duchy Documented1395–1402Effective rule
Lord · Milan · Lordship Documented1378–1394Effective ruleWestern area inherited from Galeazzo until 1385; reunited government afterwards. The ducal title begins in 1395, retaining the earlier lordship.
Recorded relationships
Parents
Galeazzo II ViscontiDocumentedBlanche of Savoy · ESDocumented
Partners
Isabella of Valois · ESDocumentedCaterina ViscontiDocumented
Sources for this profile
- Treccani · Enciclopedia Italiana · Visconti
- Deutsche Nationalbibliothek · GND authority record · Giangaleazzo, Visconti
- Treccani · Dizionario Biografico degli Italiani
- Encyclopaedia Britannica
Biographical and contextual references in their original language. Sources and methodology.
Evidence for this profile
8 recorded claims · 0 without a claim-specific source. Context references do not by themselves verify every fact.
Dates (2/2 with a precise source)
- BirthDocumented
1351
The authority record gives the birth as 1351. - DeathDocumented
1402
The authority record gives the death as 1402.
Family and relationships (4/4 with a precise source)
- FatherDocumented
Galeazzo II Visconti
Paternal relationship confirmed by the source. - MotherDocumented
Blanche of Savoy
The authority record identifies Blanche of Savoy (GND 1068354569) as mother. - Marriage or partnershipDocumented
Isabella of Valois
Marriage confirmed by the source. - Marriage or partnershipDocumented
Caterina Visconti
The authority record identifies Caterina Visconti (GND 1023069490) as spouse.
Governments (2/2 with a precise source)
- GovernmentDocumented
Duke · Milan · 1395–1402
Elevation of the same lordship to ducal rank; the title and date change while the person and territorial identity remain the same. - GovernmentDocumented
Lord · Milan · 1378–1394
Western area inherited from Galeazzo until 1385; reunited government afterwards. The ducal title begins in 1395, retaining the earlier lordship.
Biographical and contextual references (4)
Editorial history
- 2026-10-12 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
- 2026-10-08 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
- 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
- 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
- 2026-10-03 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
- 2026-09-30 · The duchy is limited to Dijon and Autun; each other fief now enters the map only under its dated ruler. John III of Namur and the Nevers/Rethel branch were added. The previous shape combined later counties and unrelated lands as if all belonged to the duchy from 1363.
- 2026-09-28 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
Keep exploring
More paths from Gian Galeazzo Visconti
Family
Galeazzo II ViscontiLord1324 – 1378Blanche of Savoy · ESConsort1336 – 1387Isabella of Valois · ESConsort1348 – 1372
Caterina ViscontiConsort1361 – 1404
Valentina ViscontiConsort1371 – 1408
Filippo Maria ViscontiDuke1392 – 1447
