Tartuffe is an opera in three acts by Kirke Mechem. Mechem also wrote the English libretto. Based on the Molière's play Tartuffe, or the Impostor, it is a modern opera buffa set in Paris in the 17th century. Tartuffe premiered on May 27, 1980, at the San Francisco Opera[1] It has since seen over 400 performances in six countries and been translated into German, Russian, Chinese, Japanese and Czech.[2] A "number opera" with arias, duets, trios and ensembles, Tartuffe is one of the most performed operas by an American composer. Also often sung is Mechem's choral arrangement of the song "The Lighthearted Lovers," excerpted from Dorine's aria, "Fair Robin I Love."