The flag of Brittany is called the Gwenn-ha-du, pronounced [ɡwɛnaˈdyː], which means white and black in Breton. It is also unofficially used in the département of Loire-Atlantique although this now belongs to the Pays de la Loire and not to the région of Brittany, as the territory of Loire-Atlantique is historically part of the province of Brittany. Nantes (Naoned), its préfecture, was once one of the two capital cities of Brittany.