Die Schweizer Familie (The Swiss Family) is an opera by the Austrian composer Joseph Weigl. It takes the form of a Singspiel in three acts. The libretto, by Ignaz Franz Castelli,[1] is based on the vaudeville Pauvre Jacques (1807) by Charles-Augustin de Basson-Pierre, known as Sewrin, and René de Chazet. The opera was first performed at the Theater am Kärntnertor, conducted by the composer, in Vienna on 14 March 1809 and was a great success in German-speaking countries in the early 19th century.[citation needed]