Polish poet and dramatic author, one of the most important poets of the Romantic period.

The son of a university professor, Słowacki was educated in Wilno (now Vilnius), Lithuania, until 1829, when he joined the Department of the Treasury in Warsaw. He was absorbed with reading and writing poetry. During the November Insurrection of 1830, he appears to have been made an envoy of the insurrectionary government. He resigned from the Treasury in 1831 and traveled to Dresden (Germany), Paris, and London, presumably carrying dispatches. In 1833–35 Słowacki was in Switzerland, and a year later he was in Italy, where he wrote his love idyll W Szwajcarii (1839; In Switzerland). His travels to the Middle East in 1837–38 are described in Podróż do ziemi świętej z Neapolu (published posthumously, 1866; “Voyage to the Holy Land from Naples”), a narrative poem. He spent most of his exile in Paris, which was the centre for the large number of émigrés who had fled from Poland following the 1830 uprising. His letters to his mother from Paris are classics of Polish prose.

Słowacki's other works include Anhelli (1838; Eng. trans. Anhelli), a poem in prose, in which he scanned the recent past and present, finding the promise of Poland's delivery in a projection of his own self. His visionary views of history also found expression in the poem Król-Duch (“The Spirit King”), published partially in 1847 and in full in 1925. He also wrote a variety of plays. Most of them—such as Lilla Weneda (1840), Sen srebrny Salomei (1844; “The Silver Dream of Salome”), and the anti-Romantic comedy Fantazy (1843; Eng. trans. “Fantazy,” in Polish Romantic Drama, 1977)—were published posthumously in 1866. His plays had a powerful influence on later dramatists and are still staged frequently in Poland.

Słowacki's romantic poems and dramas touched upon major national themes, such as Poland's yearning for independence, its belief in the integrity of the Polish people, and its faith in Polish folklore as a source of pride and strength. Misunderstood by his contemporaries, he influenced many Polish writers of the next generation, including Maria Konopnicka (Konopnicka, Maria), Kazimierz Tetmajer (Tetmajer, Kazimierz), and Stanisław Wyspiański (Wyspiański, Stanisław).