The Synod of Mantaille was held in Mantaille, in the southwestern French region of

Provence Provence (, , , , ; oc, Provença or ''Prouvènço'' , ) is a geographical region and historical province of southeastern France, which extends from the left bank of the lower Rhône to the west to the Italian border to the east; it is bor ...

, on 15 October 879 by the bishops and nobles of the region around the rivers

Rhône The Rhône ( , ; wae, Rotten ; frp, Rôno ; oc, Ròse ) is a major river in France and Switzerland, rising in the Alps and flowing west and south through Lake Geneva and southeastern France before discharging into the Mediterranean Sea. At Ar ...

and

Saône The Saône ( , ; frp, Sona; lat, Arar) is a river in eastern France. It is a right tributary of the Rhône, rising at Vioménil in the Vosges department and joining the Rhône in Lyon, at the southern end of the Presqu'île. The name ...

. They elected

Boso of Provence Boso (french: Boson; c. 841 – 11 January 887) was a Frankish nobleman of the Bosonid family who was related to the Carolingian dynasty and who rose to become King of Lower Burgundy and Provence. Origin Boso was the son of Bivin of Gorze, ...

Count of Vienne The count of Vienne was the ruler of the Viennois, with his seat at Vienne, during the period of the Carolingian Empire and after until 1030, when the county of Vienne was granted to the Archdiocese of Vienne. Girart de Roussillon ruled Provence ...

, as successor to king

Louis II of France Louis II, known as Louis the Stammerer (french: Louis le Bègue; 1 November 846 – 10 April 879), was the king of Aquitaine and later the king of West Francia. He was the eldest son of Emperor Charles the Bald and Ermentrude of Orléans. Louis ...

, dead since April. The synod marks the first occurrence of a "free election" among the

Franks The Franks ( la, Franci or ) were a group of Germanic peoples whose name was first mentioned in 3rd-century Roman sources, and associated with tribes between the Lower Rhine and the Ems River, on the edge of the Roman Empire.H. Schutz: Tools, ...

, without regard to royal descent, inspired by the principles of ecclesiastical elections.

References

879 9th century in France {{France-hist-stub