Janek is a Polish-language opera in 2 Acts by Wà Âadysà Âaw à »eleà Âski to a libretto by Ludomià  German (1851-1920). It was premiered 4 October 1900 in Lvov. The opera makes references to Polish folk tunes but otherwise is in the then current verismo style. The most popular aria is Janek's dumka from act 1.
Set in the Tatra Mountains in the 18th century. Janek, leader of a band of robbers, arrives wounded at the cottage of the sweet natured Bronka, fiancée of the Stach. Jealous of the developing romance between Janek and Bronka, Janek's own girlfriend the wild Marynka urges Stach to violence.