The plot, set in Venice in the mid-15th century, is loosely based on the true story of the downfall of doge Francesco Foscari and his son Jacopo.
Jacopo Foscari, son of the Doge of Venice, has twice been exiled, once for corruption and once for complicity in the murder of Donato, a member of the Council of Ten.
[3] He added an appendix to The Two Foscari in which he launched a stinging attack on what he considered the hypocrisies of the Poet Laureate, Robert Southey.
Byron initially wanted to challenge Southey to a duel, but then turned instead to poetry and wrote his stinging satire The Vision of Judgment.
[4] Verdi's opera I due Foscari, with a libretto by Francesco Maria Piave, was based on Byron's play.