457 was the year that Anthemius' father-in-law, Marcian, became emperor. Marcian was a Roman general who was chosen to succeed Emperor Leo I after his death in 457. Anthemius, a Roman general and politician, married Marcian's daughter, Euphemia, and later became emperor himself in 467.
Anthemius Superfan Quiz: 26 Questions to separate the real fans from the posers