Tekla Bądarzewska-Baranowska (1829/1834 – 29 September 1861) was a Polish composer.
Bądarzewska was born in 1829 in Mława or 1834 in Warsaw She married Jan Baranowski and they had five children in their nine years of marriage. Bądarzewska-Baranowska died on 29 September 1861 in Warsaw. Her grave in the Powązki Cemetery features a young woman with a roll of sheet music titled La prière d'une vierge. One of her daughters, Bronisława, was enrolled at the Warsaw Institute of Music in 1875. A crater on Venus is named after her.
Bądarzewska wrote about 35 small compositions for piano; by far her most famous composition is the piece Modlitwa dziewicy, Op. 4 ("A Maiden's Prayer", French: La prière d'une vierge), which was published in 1856 in Warsaw, and then as a supplement to the Revue et gazette musicale de Paris in 1859.
Percy Scholes, writes in The Oxford Companion to Music (9th edition, reprinted 1967) rather unkindly of Bądarzewska: "Born in Warsaw in 1838 [sic] and died there in 1861, aged twenty-three [sic]. In this brief lifetime she accomplished, perhaps, more than any composer who ever lived, for she provided the piano of absolutely every tasteless sentimental person in the so-called civilised world with a piece of music which that person, however unaccomplished in a dull technical sense, could play. It is probable that if the market stalls and back-street music shops of Britain were to be searched The Maiden's Prayer would be found to be still selling, and as for the Empire at large, Messrs. Allen of Melbourne reported in 1924, sixty years after the death of the composer, that their house alone was still disposing of 10,000 copies a year."