 Activities of small museums around Kraków and in the Lesser Poland region are promoted and supported by the Małopolska Institute of Culture; the Institute organises annual Małopolska Heritage Days.The city has several famous theatres, including the Narodowy Stary Teatr (the National Old Theatre), the Juliusz Słowacki Theatre, the Bagatela Theatre, the Ludowy Theatre, and the Groteska Theatre of Puppetry, as well as the Opera Krakowska and Kraków Operetta.The city's principal concert hall and the home of the Kraków Philharmonic Orchestra is the Kraków Philharmonic ("Filharmonia Krakowska") built in 1931.