The Hungarian Dances (German: Ungarische Tänze) by Johannes Brahms, are a set of 21 lively dance tunes based mostly on Hungarian themes, completed in 1869.
They vary from about a minute to five minutes in length. They are among Brahms’s most popular works, and were certainly the most profitable for him. Each dance has been arranged for a wide variety of instruments and ensembles. Brahms originally wrote the version for piano four hands and later arranged the first 10 dances for solo piano.
Only numbers 11, 14 and 16 are entirely original compositions. The better-known Hungarian Dances include No. 1 and 5, the latter which was based on the csárdás by Béla Kéler titled “Bártfai emlék” which Brahms mistakenly thought was a traditional folksong. (Source: Wikipedia)