The Orchestre de Bretagne (now Orchestre National de Bretagne), or Orchestra of Brittany, pursued a diversity of programming unusual among France's regional orchestras. Its repertory extended from traditional classics, to Celtic music of the region, to video game scores.

The Orchestre de Bretagne was founded in 1989 in response to a perceived lack of symphonic concerts in France's Brittany region. Originally, the orchestra was a cooperative effort mounted by the Brittany Region, the City of Rennes, the French Ministry of Culture, and the Ille-et-Vilaine and Morbihan départements in a single project. The group performs at various venues, including the Théâtre National de Bretagne and the Couvent des Jacobins hall, and it also backs productions at the Rennes Opera. The group began recording shortly after its formation, issuing albums devoted to composers Paul Le Flem, Thomas Indermühle, and Joseph-Guy Ropartz in 1995 on the Timpani and Camerata labels. The ensemble was renamed the Orchestre symphonique de Bretagne in 2012. It consists of 44 musicians, and since 2015, its music director has been conductor Grant Llewellyn. The orchestra was renamed the Orchestre National de Bretagne in 2019 when it became one of France's regional orchestras that hold the "national" designation. ~ James Manheim, Rovi