Chronograph of 345. Calendar of 345 – The Chronograph of 354 (or “Chronography”), also known as the Calendar of 354, is a compilation of chronological and calendrical texts produced in 354 AD for a wealthy Roman Christian named Valentinus by the calligrapher and illustrator Furius Dionysius Filocalus. The original illustrated manuscript is lost, but several copies have survived. It is the earliest dated codex to have full page illustrations. The term Calendar of Filocalus is sometimes used to describe the whole collection, and sometimes just the sixth part, which is the Calendar itself. Other versions of the names (“Philocalus”, “Codex-Calendar of 354”, “Chronography of 354”) are occasionally used. The text and illustrations are available online.[1]
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Chronograph of 354 – Wikipedia

https://en.m.wikipedia.org/wiki/Chronograph_of_354

The Chronograph of 354 (or “Chronography”), also known as the Calendar of 354, is a compilation of chronological and calendrical texts produced in 354 AD for a wealthy Roman Christian named Valentinus by the calligrapher and illustrator Furius Dionysius Filocalus. The original illustrated manuscript is lost, but several copies have survived. It is the earliest dated codex to have full page illustrations. The term Calendar of Filocalus is sometimes used to describe the whole collection, and sometimes just the sixth part, which is the Calendar itself. Other versions of the names (“Philocalus”, “Codex-Calendar of 354”, “Chronography of 354”) are occasionally used. The text and illustrations are available online.[1]