 On 16 January 1476 it entered into an alliance with the city of Fribourg.Due to the treaty, it was not plundered by the victorious Swiss after the Battle of Morat (22 June 1476).In 1536, as the Bernese conquered the Vaud, Bishop Sébastien de Montfalcon fled from Lausanne to Fribourg and placed himself and Bulle under the protection of that city.