In the early 20th century, American musical theater was a major source for popular songs, many of which influenced blues, jazz, country, and other extant styles of popular music. The center of development for this style was in New York City, where the Broadway theatres became among the most renowned venues in the city. Theatrical composers and lyricists like the brothers George and Ira Gershwin created a uniquely American theatrical style that used American vernacular speech and music. Musicals featured popular songs and fast-paced plots that often revolved around love and romance.