He was a cleric for the Duke of Berry in Bourges in 1406, and maître des enfants (choirmaster to the boys) at the cathedral there from 1407 to 1409.
There is a reference in a contemporary poem, Le champion des dames by Martin le Franc to Johannes Cesaris being a popular composer in Paris in the early part of the century (this is the same manuscript that contains the famous portraits of Guillaume Dufay and Gilles Binchois).
One of the secular songs, the rondeau A l'aventure va Gauvain, is in a style which suggests the later generation, and may have been written later than 1417; indeed many of his pieces are from manuscripts dated from early to mid-century.
One of his pieces, the ballade Le dieus d'amours, was copied into the famous Chantilly Codex, the illuminated manuscript which is the primary source for the Avignon repertory of the ars subtilior.
Tapissier is among the musicians mentioned by Martin le Franc in his long poem, Le Champion des dames:[1] Cesaris seems to have been mostly forgotten before the 20th-century; in 1866, the musicologist François-Joseph Fétis remarked that the names Tapissier, Carmen and Cesaris were unknown to music scholars.