Frédéric Chopin Museum – with seat in Ostrogski Palace. The founder of the museum, Frédéric Chopin Institute, began collecting exhibits as early as 1943. Today, the museum has over 5,000 of them. The Chopin museum itself was opened in 1955. Among museum collections there are numerous manuscripts, printouts, iconographic sets and other Frédéric Chopin memorabilia.