NameDuke Of Brittany Geoffrey 11 PLANTAGANET 
Birth23 Sep 1158
Death19 Aug 1186, Paris France
BurialNotre Dame Cathedral
Spouses
Birth12 Jun 1161
Death5 Sep 1201, Nantes France
Notes for Constance (Spouse 1)
As part of a diplomatic settlement in 1181, twenty-year-old Constance was forced into marriage with Geoffrey Plantagenet, the fourth son of Henry II of England and Eleanor of Aquitaine. With Geoffrey she had three children: Eleanor, Fair Maid of Brittany (1184–1241), Matilda/Maud of Brittany (1185 – bef 1189) and Arthur (1186–1203), the last born after Geoffrey's death. As de jure uxoris Duke, Geoffrey excluded Constance from exercising authority in government. In 1186, in a riding accident in Paris, Geoffrey was stamped to death during a tournament. Constance thereafter became the effective ruler of Brittany. Constance died, age 40, on 5 September 1201 at Nantes. She was buried at Villeneuve Abbey in Nantes.