The official motto of Austin, Texas is the "Live Music Capital of the World" due to the high volume of live music venues in the city. Austin is known internationally for the South by Southwest (SXSW) and the Austin City Limits (ACL) Music Festivals which feature eclectic international lineups. The greatest concentrations of music venues in Austin are around 6th Street, Central East Austin, the Red River Cultural District, the Warehouse District, the University of Texas, South Congress, and South Lamar.