What is "ruisrock"

Ruisrock is a rock festival held annually on the island of Ruissalo in Turku, Finland. Ruisrock, founded in 1970, is the second oldest rock festival in Europe (after Pinkpop) and the oldest in Finland. The festival has attracted world-famous artists throughout its lifetime except around the start of the 2000s (decade), due to the organizer's economic issues.