Catch some jazz in a city that helped make it famous. The genre's greatest come to Pittsburgh to perform at the Manchester Craftsmen's Guild, or Dowe's on Ninth, and jazz is featured prominently at smaller bars and lounges. Hear a concert at indoor and outdoor venues, or simply pick from the local music that spills out of smaller, more intimate performance spaces. Rediscover the classics with the Pittsburgh Symphony Orchestra or Pittsburgh Opera. Free music fills the city every summer at the Three Rivers Arts Festival, lunchtime concerts in Market Square, and Sunday picnics in Mellon Park. Annual festivals celebrate Pittsburgh's diverse ethnic communities, featuring blues, reggae, Irish folk, and German polkas.