Ragtime is an originally American musical genre which enjoyed its peak popularity between 1897 and 1918. Its main characteristic trait is its syncopated, or "ragged", rhythm. It began as dance music in the red-light districts of American cities such as St. Louis and New Orleans years before being published as popular sheet music for piano. Ragtime fell out of favor as Jazz claimed the public's imagination after 1917, but there have been numerous revivals since as the music has been re-discovered.