Christoph (Keller) Cellarius (22 November 1638 – 4 June 1707) was a German classical scholar from Schmalkalden who held positions in Weimar and Halle. Although the Ancient-Medieval-Modern division of history was used earlier by Italian Renaissance scholars Leonardo Bruni and Flavio Biondo, Cellarius' Universal History Divided into an Ancient, Medieval, and New Period helped popularize it. After him, this tripartite division became standard. The library of the University of Applied Sciences in Schmalkalden bears his name, it is called the "Cellarius Bibliothek", in honor of Cellarius. Bibliography Johann Wolfgang von Goethe, Memoirs of Goethe, Cellarius, Printed for Henry Colburn (London), 1824. See also Universal history Periodization 1638 births 1707 deaths People from Schmalkalden 17th-century Latin-language writers 18th-century Latin-language writers 18th-century German male writers German classical scholars People from the Landgraviate of Hesse-Kassel University of Giessen alumni Academic staff of the University of Halle University of Jena alumni