The Second Council of Mâcon was called by King Guntram and gathered bishops from his realm, as well as those of Chlotar II of whom Guntram was a guardian. Therefore, in the proceedings presided over by Priscus, metropolitan bishop of Lyon, there took part the metropolitans of Vienne, Rouen, Bordeaux, Sens, Bourges, and Arles through his representative. Also participating were forty-eight other bishops, including three without a see (among them Primatus, see [1528]), as well as eleven clerics of unknown names and ranks who represented their absent bishops. From the ambiguous account of Gregory of Tours (Histories, 8.7), we might presume that this synod was held on the 23rd of October.