Mazowsze (in Polish "Państwowy Zespół Ludowy Pieśni i Tańca 'Mazowsze'" - "State Folk Group of Song and Dance 'Mazowsze'") is a famous Polish folk ensemble founded in November 1948, named after the Mazowsze region of Poland.
Under the leadership of Professor Tadeusz Sygietyński, their first public performance was in 1950. After his death in 1955, his wife, Mira Zimińska-Sygietyńska, took over leadership duties -- a position she held until her own death in 1997.