Report on the Construction of Situations is the founding Manifesto of the Situationist International revolutionary organization. The pamphlet was published by Guy Debord in June 1957, and the following month the organization was founded, at Cosio d'Arroscia, Italy. The organization was founded by the fusion of three organizations: the Lettrist International, the International Movement for an Imaginist Bauhaus, and the London Psychogeographical Association.