In Blue Obelisk , a project that he had failed to realise in 1958 .
That finally happened in 1983 , he appropriated the Place de la Concorde by shining blue spotlights onto the central obelisk .
In Blue Obelisk , a project that he had failed to realise in 1958 , but that finally happened in 1983 , he appropriated the Place de la Concorde by shining blue spotlights onto the central obelisk .