Agnes was executed for alleged adultery .
Agnese Visconti ( 1362 -- 1391 ) , married in 1380 Francesco I Gonzaga , by whom she had one daughter .
Agnese Visconti was executed for alleged adultery .
Agnese Visconti ( 1362 -- 1391 ) , married in 1380 Francesco I Gonzaga , by whom she had one daughter .