Cas·si·o·dor·us 
(kăs′ē-ə-dôrəs), Flavius Magnus Aurelius Sixth century AD.
(kăs′ē-ə-dôrəs), Flavius Magnus Aurelius Sixth century AD. Roman statesman and historian who wrote Chronicon, a universal history to AD 519, and Institutiones, a broad course of study for a monastery.