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"Some claim that the hot air balloon was invented about 74 years earlier by the Brazilian/Portuguese priest Bartolomeu de Gusmão.[11] A description of his invention was published in 1709(?) in Vienna, and another one was found in the Vatican in about 1917.[12] However, this claim is not generally recognized by aviation historians outside the Portuguese-speaking community, in particular the Fédération Aéronautique Internationale."