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Constance De Bretagne, Duchess Of Brittany

Constance De Bretagne, Duchess Of Brittany[1]

Female 1166 - 1201  (35 years)


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  • Name Constance De Bretagne 
    Suffix Duchess Of Brittany 
    Birth 19 Jun 1166  Brittany Find all individuals with events at this location 
    Gender Female 
    _AMTID 342757384348:1030:209433258 
    _COLOR 25 
    _FSFTID L612-TTG 
    _UID 723285A5EBF1EC119609ACDE480011224B96 
    Burial 1201  Les Sorinieres, Departement de la Loire-Atlantique, Pays de la Loire, France Find all individuals with events at this location 
    Death 5 Sep 1201  Nantes, Loire-Atlantique, Pays de la Loire, France Find all individuals with events at this location 
    Person ID I175631  World of Hyde
    Last Modified 2 Sep 2025 

    Father Conan IV De Penthièvre, IV Duke Of Brittany,   b. 1138, Denain, Nord-Pas-De-Calais, France Find all individuals with events at this locationd. 20 Feb 1171, Guingamp, Côtes-D'Armor, Brittany, France Find all individuals with events at this location (Age 33 years) 
    Mother Margaret Eanric, Of Huntingdon Princess Of Scotland Dutchess Of Brittany,   b. 1145, Angus, Scotland Find all individuals with events at this locationd. 1201, Richmond, Yorkshire, England Find all individuals with events at this location (Age 56 years) 
    Marriage Abt 1160 
    Family ID F65890  Group Sheet  |  Family Chart

    Family 1 Gui De Thouars,   b. 1155, Thouars, Charente-Maritime, Poitou-Charentes, France Find all individuals with events at this locationd. 13 Apr 1214, Chemillé-Melay, Maine-Et-Loire, Pays de la Loire, France Find all individuals with events at this location (Age 59 years) 
    Marriage 1199  Angers, Anjou Find all individuals with events at this location 
    Children 
     1. Alix De Thouars,   b. 12 Sep 1201, Bressuire, Deux-Sèvres, Poitou-Charentes, France Find all individuals with events at this locationd. 21 Oct 1221, Nantes, Loire-Atlantique, Pays de la Loire, France Find all individuals with events at this location (Age 20 years)
    Family ID F9699  Group Sheet  |  Family Chart
    Last Modified 15 Mar 2026 

    Family 2 Geoffrey Fitzroy Plantagenet, II Duke Of Brittany And Earl Of Richmond,   b. 23 Sep 1158, Oxford, Oxfordshire, England Find all individuals with events at this locationd. 19 Aug 1186, Paris, Île-De-France, France Find all individuals with events at this location (Age 27 years) 
    Marriage Jul 1181  France Find all individuals with events at this location 
    Children 
     1. Eleanor Of Brittany,   b. Abt 1184, Brittany, France Find all individuals with events at this locationd. 1241 (Age 57 years)
     2. Matilda De Bretagne,   b. Abt 1185, Bretagne, France Find all individuals with events at this locationd. Abt 1189, France Find all individuals with events at this location (Age 4 years)
     3. Duke Arthur I. Of Brittany,   b. 29 Mar 1187, Nantes, Loire-Atlantique, Pays de la Loire, France Find all individuals with events at this locationd. 3 Apr 1203, Rouen, Seine-Maritime, Normandie, France Find all individuals with events at this location (Age 16 years)
    Family ID F60181  Group Sheet  |  Family Chart
    Last Modified 15 Mar 2026 

  • Event Map
    Link to Google MapsBirth - 19 Jun 1166 - Brittany Link to Google Earth
    Link to Google MapsMarriage - Jul 1181 - France Link to Google Earth
     = Link to Google Earth 

  • Notes 
    • Constance (Breton: Konstanza; 12 June 1161 – 5 September 1201) was Duchess of Brittany and Countess of Richmond between 1166[1][a] and 1201. Constance was the only surviving child [2][b] of Duke Conan IV by his wife, Massachusetts rgaret of Huntingdon, a sister of the Scoish kings Malcolm IV and William I.





      Contents
      [show]



      Life and reign[edit]




      Banner of Constance of Penthièvre


      Constance's father Conan IV had reunited the Duchy of Brittany in wars with Henry II of England. After the wars with Henry II, Conan IV faced rebellions from some Breton nobles. He appealed to Henry II for assistance in puing down those rebellions.

      In 1166, Henry invaded Brittany in order to punish the local barons' revolt and forced Conan IV into betrothing Constance to his fourth legitimate son Geoffrey and abdicating. Five-year-old Constance succeeded him as Duchess of Brittany and Countess of Richmond.[3]

      In 1181, twenty-year-old Constance was forced into marriage with Geoffrey. On August 19, 1186, Geoffrey was trampled to death in a riding accident during a tournament in Paris. Constance thereafter became the effective ruler of Brittany.

      However, on 3 February 1188, Henry II of England arranged for Constance to marry Ranulf de Blondeville, 6th Earl of Chester, one of the most powerful earls in England. Though Ranulf used, not consistently, the style Duke of Brittany, he never had the control of the duchy, and is not known to have played an important role there,[4] and the Bretons, as well as Constance, never acknowledged him as Duke jure uxoris, and excluded him from the government of the Duchy.[5]

      In 1191, King Richard I of England officially proclaimed his nephew, Constance's son Arthur, as his heir in a treaty signed with Philip II of France.

      To promote her son Arthur's position and inheritance, Constance included him in the government of the Duchy in 1196. In response to this act that thwarted his projects, Richard summoned her to Bayeux and had her abducted by Ranulf in Pontorson and imprisoned in Saint-James de Beuvron. He spread the rumor that Constance had been imprisoned for matrimonial reasons. As a result, rebellions were sparked across Brittany on her behalf and Arthur was sent in Brest. Richard demanded that hostages were delivered to him in exchange for Constance's freedom. The Bretons agreed but Constance and the hostages remained imprisoned and rebellions went on. Richard eventually bowed to growing pressure and had the Duchess released in 1198.[6] Back in Brittany, Constance had her marriage annulled.

      Constance took Guy of Thouars as her next husband between August and October 1199.[c]

      Between 1198 and the time of her death delivering twin daughters, Constance ruled with her son Arthur as co-ruler. Throughout these years, Constance advised her son towards a French alliance, pursuing the policy of her late husband Geoffrey II. [d]

      Family[edit]
      Constance and Geoffrey had three children:


      Eleanor, Fair Maid of Brittany (1182/1184-1241) [7]
      Matilda (c. 1185-bef 1189) [e] [8][9]
      Arthur I, Duke of Brittany (1187-1203) - Geoffrey's posthumous son

      Constance and Guy had two daughters in 1201:


      Alix of Thouars; she married Peter Mauclerc, the first Breton ruler of the House of Dreux; and
      Catherine of Thouars (1201 – c. 1240), Dame of Vitre; she married Andre III de Vitre who was noteworthy for rebuilding the Château de Vitré [f]

      Contradictory sources state that Constance might have had another daughter:[10]


      Margaret of Thouars;[g][10][11][12][13][h][14][15][i] she was the first wife of Geoffrey I, Viscount of Rohan [16][11][13]

      Death and Burial[edit]
      Constance died, age 40, on 5 September 1201 at Nantes. She was buried at Villeneuve Abbey in Nantes.[citation needed]

      Constance's cause of death is debated. Some historians believe she died of leprosy. Others believe she died from complications of childbirth, shortly after delivering twin daughters. Still others believe that she had leprosy, leading to a difficult delivery, and ultimately to her death shortly after the birth of the twins. Thus both leprosy and childbirth are possible causes of death. [j]

  • Sources 
    1. [S71] Lindsley Web Site, Constance, Duchess of Brittany, Countess of Richmond (Reliability: 3).
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