"Constance" is the celebrated aria from Fromental Halévy's grand opera "La Juive" (The Jewess), premiered in 1835. The opera, with a libretto by Eugène Scribe, was one of the most popular and influential works of the 19th century. The aria is sung by the character Princess Eudoxie. The opera's dramatic power and Halévy's mastery of grand opera form, including this aria, were notably admired by composers like Richard Wagner.