The genesis of Rossini's first full-scale opera Demetrio e Polibio is shrouded in speculation, but its initial intention as a family opera for the tenor Domenico Mombelli, with roles for his daughters and a libretto by his wife seems clear. Its narrative of political turmoil, romance, kidnap, and the ultimate blessings of true love and unity is a prelude to subjects to which Rossini would frequently turn in future triumphs. The composers facility for melody and his genius for combining voices into the loveliest of duets is already much in evidence in this confident but rarely heard debut.