The Chronography of 354, also known as the Calendar of 354, was a 4th-century illuminated manuscript, which was produced in 354 AD for a wealthy Roman Christian named Valentinus. It is the earliest dated codex to have full page illustrations. None of the original has survived. 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") are occasionally used. The text and illustrations are available online. Amongst other historically significant information, the work contains the earliest reference to the celebration of Christmas as a holiday or feast.
The original volume has not survived, but it is thought that it still existed in Carolingian times, by the 7th-8th centuries. A number of copies were made at that time, with and without illustrations, which in turn were copied at the Renaissance.
The most complete and faithful copies of the illustrations are the pen drawings in a 17th-century manuscript from the Barberini collection (Vatican Library, cod. Barberini lat. 2154). This was carefully copied, under the supervision of the great antiquary Nicholas-Claude Fabri de Peiresc, from a Carolingian copy, a Codex Luxemburgensis, which was itself lost in the 17th century. These drawings, although they are twice removed from the originals, show the variety of sources that the earliest illuminators used as models for manuscript illustration, including metalwork, frescoes, and floor mosaics. The Roman originals were probably fully painted miniatures.
Various partial copies or adaptations survive from the Carolingian renaissance and Renaissance periods. Botticelli adapted a figure of the city of Treberis (Trier) who grasps a bound barbarian by the hair for his painting, traditionally called Pallas and the Centaur.
The Vatican Barberini manuscript, made in 1620 for Peiresc, who had the Carolingian Codex Luxemburgensis on long-term loan, is clearly the most faithful. After Peiresc's death in 1637 the manuscript disappeared. However some folios had already been lost from the Codex Luxemburgensis before Peiresc received it, and other copies have some of these. The suggestion of Carl Nordenfalk that the Codex Luxemburgensis copied by Peiresc was actually the Roman original has not been accepted. Peiresc himself thought the manuscript was seven or eight hundred years old when he had it, and, though Mabillon had not yet published his De re diplomatica (1681), the first systematic work of paleography, most scholars, following Schapiro, believe Peiresc would have been able to make a correct judgement on its age. For a full list of manuscripts with copies after the originals, see the external link.