 Bulle probably came under the secular power of the Bishop of Lausanne as early as the 6th century, and together with Avenches and Curtilles formed the territory originally owned by the bishop.Since the counts of Gruyères also possessed sovereign rights in Bulle, there were numerous conflicts between the counts and the bishop in the 12th, 13th and 14th centuries.Since these conflicts were always decided in favor of the bishop, the counts eventually lost all rights in Bulle.