The Calendar of 354 is an illuminated manuscript produced for a wealthy Roman Christian named Valentius. It is the earliest dated codex with full page illustrations; however none of the original survived. It is thought that the original may have existed in the Carolingian period, when a number of copies were made, with or without illustrations. These were copied during the Renaissance.
It is signed by Furius Dionysius Filocalus, with the word "titulavit," as creator of the titles which "display great calligraphic mastery."