Bartolf of Nangis
Bartolf of Nangis or Bartolfus peregrinus was a French historian who died shortly before 1109.Writings
His Gesta Francorum Iherusalem expugnatium is a chronicle of the First Crusade. It draws heavily on the anonymous Gesta Francorum but includes some original details, such as information on Bohemond's crusade to the Byzantine Empire, not attested in any other chronicles. Bartolf also draws in places on the original, now-lost 1106 version of Fulcher of Chartres's history, making his chronicle particularly useful to scholars of Fulcher's work.
