The first of Strabo's major works, Historical Sketches (Historica hypomnemata), written while he was in Rome (ca. 20 BCE), is nearly completely lost. Meant to cover the history of the known world from the conquest of Greece by the Romans, Strabo quotes it himself and other classical authors mention that it existed, although the only surviving document is a fragment of papyrus now in possession of the University of Milan (renumbered [Papyrus] 46).