Simplify the following text for a Grade 14 native English-speaking person.
Original: 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 ) .
Simplified: Although Strabo quotes it himself , and other classical authors mention that it existed , the only surviving document is a fragment of papyrus now in possession of the University of Milan ( renumbered ( Papyrus ) 46 ) .