From the Word Press Facebook group: https://www.facebook.com/groups/332290193580349/
Artist: Otto Piene (18 April 1928)
Completion Date: 1972
Style: Sky art
1967 marks Piene’s involvement with Sky art, a term he coined in 1969 and which allowed him to use landscape and cities themselves as the focal point of his work. For the closing of the 1972 Summer Olympics in Munich, Piene created the sky work Olympic Rainbow, made up of five differently coloured helium-filled polythene tubes, each one 600 m long.