Reunification of Brittany

Breton and Pan-Celtic flags, Church of Saint-Pierre and Saint-Paul during the Maniff Breizh (in support of the reunification of Brittany) in Nantes on September 24, 2016
French administrative regions, with Brittany in dark blue and the Loire-Atlantique department in light blue

The Reunification of Brittany or Breton Reunification is a political movement to reunite the Loire-Atlantique department with the administrative region of Brittany, to form the entire cultural and historical region of Brittany. This "reunification" is considered a prerequisite for further Breton autonomy.