She participated in documentas IV (1968) and VI (1977). In 1968, Riley represented Great Britain in the Venice Biennale, where she was the first British contemporary painter, and the first woman, to be awarded the International Prize for painting. Her disciplined work lost ground to the assertive gestures of the Neo-Expressionists in the 1980s, but a 1999 show at the Serpentine Gallery of her early paintings triggered a resurgence of interest in her optical experiments. "Bridget Riley: Reconnaissance", an exhibition of paintings from the 1960s and 1970s, was presented at Dia:Chelsea in 2000. In 2001, she participated in Site Santa Fe, and in 2003 the Tate Britain organised a major Riley retrospective. In 2005, her work was featured at Gallery Oldham. Between November 2010 and May 2011, her exhibition "Paintings and Related Work" was presented at the National Gallery, London.