About António Machado dos Santos
Lived 1875 – 1921 (aged 46). António Machado dos Santos was a Portuguese politician and revolutionary, known for 5 October 1910 revolution.
António Maria de Azevedo Machado Santos (10 January 1875 – 19 October 1921) was a Portuguese Navy officer, remembered as the "Hero of the Rotunda" for his role in the 5 October 1910 revolution.
He left a personal account of the revolution, titled A Revolução Portuguesa: Relatório de Machado Santos ("The Portuguese Revolution: A Report by Machado Santos", published in 1911), one of the most complete accounts of the preparation of the revolutionary movement.
Soon after the Republican Party started to split into different parties, he was opposed to the politics of those put in power following the revolution. He founded and published the opposition newspaper O Intransigente ("The Intransigent"). He established the Reformist Party and took part in the failed military coup of 27 April 1913 that aimed to topple Afonso Costa's government, and later, in 1915, supported General Pimenta de Castro's government. On 13 December 1916, he led the failed Tomar Revolt and was briefly arrested; in 1917, he was part of Sidónio Pais's military junta and government cabinets, until Pais's assassination in 1918.
In 1919, he helped suppress a monarchist counter-revolution in the north of the country; That year, he launched a new independent Republican party, which he called the National Republican Federation.
In 1921, he was assassinated during a military insurrection that became known as the Bloody Night. He was posthumously decorated with the Grand Cross of the Order of the Tower and Sword, in 1926.
Distinctions National orders
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Important facts
People in António Machado dos Santos's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped António Machado dos Santos's
Frequently asked questions
Who was António Machado dos Santos?
Portuguese politician (1875-1921)
When was António Machado dos Santos born?
António Machado dos Santos was born on 10 January 1875 in Lisbon.
When did António Machado dos Santos die?
António Machado dos Santos died on 19 October 1921 in Lisbon.
What was António Machado dos Santos's occupation?
António Machado dos Santos was a politician and revolutionary.
What was António Machado dos Santos known for?
António Machado dos Santos was known for 5 October 1910 revolution.
What nationality was António Machado dos Santos?
António Machado dos Santos was Portuguese.
Sources & further reading
· Wikipedia: António Machado dos Santos
· DBpedia: António Machado Santos
Cite this page
APA: Biography.guide. (2026). António Machado dos Santos. https://biography.guide/antonio-machado-dos-santos/
MLA: "António Machado dos Santos." Biography.guide, https://biography.guide/antonio-machado-dos-santos/.
Chicago: "António Machado dos Santos." Biography.guide. https://biography.guide/antonio-machado-dos-santos/.
Data last updated: 2026-09-23 · Spot an error? Report a correction.
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