Káťa Kabanová (also known in various spellings including Katia, Katja, Katya, and Kabanowa) is an opera in three acts, with music by Leoš Janáček to a libretto by Vincenc Červinka [cz], based on The Storm, a play by Alexander Ostrovsky. The opera was also largely inspired by Janáček's love for Kamila Stösslová. This is often considered his first "mature" opera, despite the fact that he was 67 when it was premiered. Káťa Kabanová is a clear response to Janáček's feelings for Kamila, and the work is dedicated to her. The first performance was at the National Theatre Brno on 23 November 1921.