Ulysses Silveira Guimarães (Rio Claro, October 6, 1916 – Angra dos Reis, October 12, 1992) was a Brazilian politician and lawyer, and one of the primary opponents of the military dictatorship. He served as president of the 1987–1988 National Constituent Assembly, which ushered in a new democratic order following 21 years of military rule.
