User blog comment:Gabriel Auditore/Assassinews 09/02 - Assassin's Creed: Initiates/@comment-5479055-20120909172128/@comment-4975789-20120911161911

According to the ACInitiates website, it seems to be somewhere along the Via Prenestina, Roma, RM, Italia (copy+paste that into Google Earth/Maps) at the point where the Via Aristide Staderini turns off.