Conan I and the Reunification of Brittany …

Years: 990 - 990

Conan I and the Reunification of Brittany (990)

In the spring of 990, Conan I, Count of Rennes, assumed the title of Duke of Brittany, following his successful attack on Nantes and the subsequent death of Count Alan. His rise to power marked the end of a period of fragmentation in Brittany, as he sought to unify the duchy under his rule.

The End of Fractured Rule

Brittany had endured a prolonged period of instability following the death of Drogo of Brittany, whose regency had governed the duchy. After his passing, Brittany fractured under the divided rule of his brothers:

  • Hoël and Guerech controlled different regions, resulting in a brief vacancy in the ducal title.
  • This political disunity weakened the duchy and left it vulnerable to external pressures.

Conan I emerged as the dominant Breton leader, but before he could secure the title of Duke, he had to ally himself with Odo I, Count of Blois, a powerful regional figure who helped consolidate his claim.

Marriage Alliance with Anjou

Long before assuming the title of Duke, Conan had reinforced his position through a dynastic marriage:

  • In 973, he wed Ermengarde-Gerberga of Anjou, daughter of Geoffrey I, Count of Anjou, and Adele of Vermandois.
  • This alliance with the House of Anjou bolstered Conan’s standing among the great feudal lords of northwestern France.

Religious Patronage and Land Grants

As Duke, Conan I extended land grants to religious institutions, strengthening ties with the powerful monastic orders. In a charter dated July 28, 990, he granted Villamée, Lillele, and Passille to Mont Saint-Michel—territories that would later become part of the seigneury of Fougères.

A More Unified Brittany

With his consolidation of power in 990, Conan I helped end the fractured rule that had plagued Brittany, asserting ducal authority over Rennes and Nantes. Though tensions among Breton nobles persisted, his reign marked the beginning of a more centralized rule in the duchy, setting the stage for future Bretons to assert their independence within the feudal order of medieval France.

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