Chateaubriand was a media mogul in Brazil between the late 1930s and the early 1960s and the owner of Diários Associados, a conglomerate that counted at its peak more than a hundred newspapers, radio and TV stations, magazines and a telegraphic agency.
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Assis Chateaubriand was founder and director of the then main press chain of Brazil, the Diários Associados: 34 newspapers, 36 radio stations, 18 television stations, one news agency, one weekly magazine (O Cruzeiro), one monthly magazine (A Cigarra) as well as many magazines for children.
MASP (The Museum of Art of São Paulo) was established on 2nd October, with temporary offices on the second floor of the headquarters of the Diários Associados on Rua Sete de Abril.