The Jacobin (Jakobín in Czech) is an opera in three acts by Antonín Dvořák to an original Czech libretto by Marie Červinková-Riegrová. Červinková-Riegrová took some of the story's characters from the story by Alois Jirásek, "At the Ducal Court", but devised her own plot about them. The first performance was at the National Theatre, Prague, 1889. Červinková-Riegrová revised the libretto, with Dvořák's permission, in 1894, notably in the last act. Dvořák himself revised the music in 1897 (the revised premiere was on 19 June 1898, under Adolf Čech).
The composer felt great affection for the subject of the opera, as the central character is a music teacher, and Dvořák had in mind his former teacher Antonin Liehmann, who had a daughter named Terinka, the name of one of the opera's characters.
John Clapham has briefly discussed the presence of Czech musical style in the opera.H. C. Colles has described this opera as "the most subtle and intimate of his peasant operas", and noted "how clearly its scenes are drawn from life".
Bohuš has returned to his home-town, incognito, with his wife Julie. His mother is dead and his father, the Count, has disowned him and has become a recluse. Meanwhile, the Count's Burgrave pays court to the schoolmaster Benda's daughter, Terinka, who is, however, in love with Jiří. The Burgrave is suspicious of Bohuš and Julie, especially as they have come from Paris, where the Count's son is said to be allied with the Jacobins. To everyone's surprise, the Count himself now appears, confirming that he no longer regards Bohuš as his son, and that his heir will be his nephew Adolf. Adolf and the Burgrave rejoice, while Bohuš and Julie, hidden among the crowd, are horrified at the turn that events have taken.
In the school, Benda rehearses a chorus of children and townsfolk, together with Terinka and Jiří as soloists, in a cantata which will celebrate Adolf's new position. After the rehearsal, Terinka and Jiří declare their love, but Benda returns and announces that his daughter must marry the Burgrave. An argument develops, but suddenly the people return, alarmed at the rumour that sinister Jacobins have arrived in the town. The townsfolk run away in terror as Bohuš and Julie arrive to ask Benda if he can accommodate them for a few days. He is inclined to refuse, but when they reveal that they are Czechs who have sustained themselves in foreign countries through singing the songs of their native land, he, Terinka and Jiří are overcome with emotion and are happy to shelter them. The Burgrave comes to woo Terinka, but she rejects him. When Jiří defies him, the Burgrave threatens to force him into the army, but suddenly Adolf enters, wanting to find out if the "Jacobin" (Bohuš) has been arrested. The Burgrave prevaricates, but Bohuš himself arrives and reveals who he is. He and Adolf quarrel, and Adolf orders Bohuš's arrest.