Maria Gabriela Stefania Korwin-Piotrowska (1857–1921), known as Gabriela Zapolska, was a Polish novelist, playwright, naturalist writer, feuilletonist, theatre critic and stage actress. Zapolska wrote 41 plays, 23 novels, 177 short stories, 252 works of journalism, one film script, and over 1,500 letters.

The Morality of Mrs. Dulska is a play by Gabriela Zapolska that debuted in Kraków in 1906. Hailed as a key work in early modern Polish drama, Zapolska's play tackles issues of social justice, socialism, morality, conscience, and the performative duality of social identity. It has inspired many film adaptations and has appeared on stage in many forms, even as a musical comedy.