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…according to Peter the Deacon in a sermon delivered in honor of Saint Placidus, disciple of Saint Benedict the Abbot. Eucherius also reports in a certain oration in praise of Saint Clement, preserved in the monastery of Monte Cassino, that around the year 270, another Roman senator named Placidus, descended from the aforementioned Octavian line and from the …
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/HistoriaEustachio/historia1.php