Caesarius of Arles, French bishop and saint (b. 470)
Caesarius of Arles (Latin: Caesarius Arelatensis; 468/470 – 27 August 542 AD), sometimes called "of Chalon" (Cabillonensis or Cabellinensis) from his birthplace Chalon-sur-Saône, was the foremost ecclesiastic of his generation in Merovingian Gaul. Caesarius is considered to be of the last generation of church leaders of Gaul that worked to promote large-scale ascetic elements into the Western Christian tradition. William E. Klingshirn's study of Caesarius depicts Caesarius as having the reputation of a "popular preacher of great fervour and enduring influence". Among those who exercised the greatest influence on Caesarius were Augustine of Hippo, Julianus Pomerius, and John Cassian.

The most important problem for Caesarius was the efficiency of the bishop's fulfillment of his pastoral duties. By that time, preaching had already become part of the standard church service in Gaul; many bishops recognized the importance of such a means of educating morality and encouraged it. However, Caesarius' enthusiasm was outstanding in its own way, and he urged his clergy to preach as often as possible, in the church and outside it, to the willing and the opposing. Caesarius' sermon topics generally dealt with moral issues.