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Belisario Domínguez Palencia (April 25, 1863 in Comitán, Chiapas – October 7, 1913 in Mexico City) was a Mexican physician and liberal politician. He served as senator and gave a memorable speech in the Congress during the Mexican Revolution against the dictator Victoriano Huerta, for which he was murdered.
Domínguez was born to Cleofas Domínguez and María del Pilar Palencia. His grandfather, Don Quirino Domínguez y Ulloa, had been vice-governor of Chiapas.
He attended a colegio in San Cristóbal de las Casas, Chiapas. In 1879 he went to Paris where he studied medicine; he lived in Paris for 10 years. In 1889 he returned to Mexico and in 1890 he married Delina Zebadúa, with whom he had four children. His wife died young.
In 1909, he was elected mayor of Comitán. In 1912, Leopoldo Gout and he ran for a seat in the Senate (Domínguez as substitute senator); when Gout died, Domínguez replaced him. In 1913 he gave a speech in Congress against the dictator Victoriano Huerta and as a result he was murdered in Mexico City by Gilberto Márquez, Alberto Quiroz, José Hernández Ramírez, Gabriel Huerta, and Dr Aureliano Urrutia who chopped off Domínguez's tongue.