Frankish synods of 829
The Frankish church held four synods simultaneously throughout the Frankish Empire on the octave of Pentecost in 829. These were held in Lyon, Mainz, Paris and Toulouse. They were followed by an imperial diet in Worms in August.
According to Gerhard Schmitz, the synods of 829 mark a break in the history of Frankish legislation. Until then, Louis the Pious's government was characterised by continuity with his father's. Carine van Rhijn, however, emphasises the similarity of the 829 synods to the reform councils of 813.
Convocation
The emperors Louis the Pious and Lothar I convoked the synods in December 828. The text of their convocation, known as the Constitutio de synodis, survives. Four archbishops were summoned to Mainz: Otgar of Mainz, Hadbold of Cologne, Hetto of Trier and Bernoin of Besançon; four to Paris: Ebbo of Reims, of Rouen, Lantramn of Tours and the Sens; five to Lyon: Agobard of Lyon, Bernard of Vienne, Andrew of Tarentaise, Benedict of Aix and Agaricus of Embrun; and four to Toulouse: of Arles, Bartholomew of Narbonne, Adelelm of Bordeaux and Agilulf of Bourges.The agenda of the synods was to identify what in the empire fell short of God's standards and to correct it. The morals of the clergy and the abuse of authority by officials were especially in focus. The synods were a response to major military failures in 827. Duke Baldric of Friuli had been removed from office for his failure to stop a Bulgarian invasion by Omurtag and Counts Matfrid of Orléans and Hugh of Tours were likewise dismissed after failing to meet the invasion of Abu Marwan.