The Frederick Chopin Museum at the Frederick Chopin Society in Warsaw was established in the 1930s. It is located in Palac Ostrogskich or Zamek Ostrogskich (Ostrogski Palace or Ostrogski Castle). The museum contains Chopin’s memorabilia such as the composer’s autographs, letters, portraits, mementos and manuscripts. There is also a library with the collections of books, recordings as well as photographs. The Palace also houses a concert hall, which hosts Chopin’s music concerts.