Rawa Blues Festival

Held in Katowice, in Poland's Silesia region, this festival is considered the world's largest indoor blues festival, with its main concerts staged inside the Spodek arena. Launched in 1981 and named after the Rawa River running through the city, it has become Poland's best known blues event. It pairs a main stage featuring international artists with a competitive support stage where the audience votes for a band to graduate to the main stage.