In northern corner of the park is the Crystal Palace Bowl, a natural amphitheatre where large-scale open-air summer concerts have been held since the 1960s. These have ranged from classical and orchestral music, to rock, pop, blues and reggae. The likes of Pink Floyd, Bob Marley, Elton John, Eric Clapton and the Beach Boys all played the Bowl during its heyday. The stage was rebuilt in 1997 with an award-winning permanent structure designed by Ian Ritchie., which was nominated for the prestigious RIBA Stirling Prize.