Kazimierz Sikorski (June 28, 1895 – July 23, 1986) was a Polish composer. His arrangement of the "Mazurek Dąbrowskiego" is currently used as the Polish national anthem.Sikorski was born in Zurich, but studied in Warsaw, first music at the Warsaw Conservatory and then philosophy at the University of Warsaw. He then studied in Lwów, which was Polish at the time, where he was a student of Adolf Chybiński, and Paris under Nadia Boulanger. In 1926, he became a teacher of composition at the Conservatory of Poznań. From 1927 to 1945, he taught at the Warsaw Conservatory. He was rector of the State Higher School of Music in Łódź. From 1951 to 1966, he taught music theory and composition at the Music Academy Warsaw. See: List of music students by teacher: R to S#Kazimierz Sikorski. During this time, he was president of the Polish Composers' Union.