The 1962 street installation Rideau de Fer (Iron Curtain) by Christo and Jeanne-Claude is cited as an early example of unsanctioned street art.
1962年Christo and Jeanne-Claude（英语：Christo and Jeanne-Claude）的街頭裝置 Rideau de Fer(鐵幕)則是一個未經批准的街頭藝術的早期例子。