How revolution in Lisbon brought down a centuries-old monarchy, sent King Manuel II into exile and opened one of the most turbulent chapters in modern Portuguese history

By Open Chronicle History Desk

On the morning of October 5, 1910, Lisbon belonged to a revolution.

For two days, republican insurgents, sailors and soldiers had fought forces loyal to the Portuguese monarchy.

Warships anchored in the Tagus had turned their guns toward positions associated with the government.

Barricades appeared in the streets.

Artillery echoed across the capital.

Crowds gathered around the center of Lisbon.

The monarchy was collapsing.

Then, from the balcony of Lisbon’s Paços do Concelho, the Republic was proclaimed.

Portugal had entered a new political age.

King Manuel II, only twenty years old, had already fled Lisbon. He would soon leave Portugal for exile in Britain.

The House of Braganza’s rule was over.

A monarchy whose origins stretched back to the foundation of the Portuguese kingdom in the Middle Ages had been replaced by the Portuguese Republic.

But October 5 was not simply the story of a revolution that succeeded.

It was the culmination of decades of political conflict, economic frustration, republican organization, colonial tensions and growing disillusionment with the constitutional monarchy.

And the republic that emerged from the revolution would soon discover that overthrowing an old political order was easier than building a stable new one.

1. One of Europe’s Oldest Kingdoms

Portugal was one of Europe’s oldest independent states.

The Portuguese monarchy had emerged during the twelfth century, when Afonso Henriques established the kingdom that would eventually become Portugal.

Over the centuries, kings ruled through radically different political systems.

Medieval monarchy.

Imperial monarchy.

Absolutism.

Constitutional monarchy.

Portugal built a maritime empire stretching across Africa, Asia and South America.

Portuguese navigators crossed oceans and established trading networks linking continents.

Lisbon became one of the great ports of early modern Europe.

But by the nineteenth century, Portugal’s political world had changed dramatically.

2. The Constitutional Monarchy

The nineteenth century was turbulent.

Napoleon’s armies invaded Portugal.

The royal court fled to Brazil.

Brazil later became independent.

Liberals and absolutists fought a civil war.

By the middle of the century, Portugal had become a constitutional monarchy.

The king remained head of state, but government increasingly operated through constitutional institutions, parliament and political parties.

Two major political forces dominated much of the system.

The Regenerador Party.

And the Progressive Party.

Governments frequently alternated between them.

This system became known as rotativismo.

For decades, it provided a degree of political continuity.

Eventually, however, many Portuguese came to regard it as closed, corrupt and incapable of solving the country’s problems.

3. A Country Under Pressure

Portugal entered the final decades of the nineteenth century facing serious challenges.

Public finances were fragile.

Industrial development lagged behind parts of Western Europe.

Large sections of the population remained poor.

Illiteracy was widespread.

Emigration increased.

The political system appeared increasingly disconnected from many citizens.

At the same time, republican ideas were spreading through urban intellectual circles, journalism, professional groups and sections of the working and middle classes.

The monarchy still had supporters.

But republicanism was becoming a serious political force.

4. The Portuguese Republican Party

The Portuguese Republican Party, the Partido Republicano Português, became the principal organized movement seeking to replace the monarchy.

Republicans argued that Portugal required more than another change of government.

It required a change of regime.

They associated the monarchy with political stagnation and national decline.

The republic was presented as an alternative based on citizenship, secular government, education and political renewal.

Republican newspapers spread the message.

Clubs organized supporters.

Public commemorations became political demonstrations.

Lisbon became the movement’s principal stronghold.

Then an international crisis gave republicanism an extraordinarily powerful weapon.

5. The British Ultimatum

In the late nineteenth century, Portugal still possessed extensive territories in Africa.

Portuguese imperial ambitions increasingly collided with British plans for the continent.

Portugal hoped to connect Angola on Africa’s Atlantic coast with Mozambique on the Indian Ocean.

The ambition became associated with the famous Pink Map, which represented Portuguese territorial claims across south-central Africa.

Britain had its own strategic ambitions.

In January 1890, the British government delivered an ultimatum demanding the withdrawal of Portuguese forces from disputed territories.

Portugal yielded.

The political consequences were explosive.

6. National Humiliation

For many Portuguese, the British Ultimatum became a national humiliation.

Britain was Portugal’s historic ally.

Yet the Portuguese government had been forced to retreat.

Republicans used the crisis relentlessly.

They argued that the monarchy had failed to defend Portugal’s national dignity.

Anti-British demonstrations erupted.

Nationalist sentiment intensified.

A song composed during the crisis would acquire enormous political significance.

Its name was:

A Portuguesa.

Twenty years later, it would become the national anthem of the Portuguese Republic.

7. Republicanism Grows

The republican movement expanded during the 1890s and early twentieth century.

Its strongest support was concentrated particularly in urban areas, especially Lisbon.

Republican politicians entered parliament.

Newspapers attacked the monarchy.

Political clubs organized activists.

Secret revolutionary networks also developed.

Among the most important was the Carbonária Portuguesa, a clandestine organization that would play a significant role in preparing the revolution.

Republicanism was no longer simply an intellectual movement.

It was becoming capable of insurrection.

8. Carlos I

King Carlos I ascended the throne in 1889.

Cultivated and personally interested in science, oceanography and the arts, Carlos nevertheless inherited a political system under growing strain.

Government finances remained difficult.

Party politics became increasingly unstable.

Republicans attacked the monarchy.

Monarchists themselves divided.

The king increasingly became identified with the failures of the political establishment, whether or not those failures could reasonably be attributed to him personally.

By the first years of the twentieth century, the constitutional system was approaching crisis.

9. João Franco

In 1906, King Carlos appointed João Franco to lead the government.

Franco initially promised reform.

But political conflict intensified.

Eventually parliament was dissolved and Franco governed without it.

His opponents described the regime as a dictatorship.

Republicans and other critics argued that constitutional government was being undermined.

Political tensions became increasingly dangerous.

Then came February 1, 1908.

10. The Lisbon Regicide

The Portuguese royal family returned to Lisbon from Vila Viçosa.

Their carriage passed through the Terreiro do Paço, today’s Praça do Comércio.

Gunmen attacked.

King Carlos I was killed.

His eldest son and heir, Luís Filipe, Prince Royal, was also mortally wounded.

Queen Amélie survived.

The king’s younger son, Manuel, was wounded but lived.

Portugal had experienced a regicide in the heart of its capital.

The political shock was enormous.

11. Manuel II

The surviving prince became king.

Manuel II was eighteen years old.

He had not been prepared to inherit the throne so soon.

His older brother had been the heir.

Now the young king faced an extraordinarily difficult task.

He attempted to restore constitutional normality.

João Franco left power.

Governments changed.

Efforts were made to reduce political tensions.

But the monarchy’s underlying problems remained.

The republican movement continued to grow.

And Manuel had very little time.

He would reign for less than three years.

12. The Republican Network

By 1910, republicans were preparing for revolution.

The conspiracy involved civilian activists, military officers and sailors.

The Carbonária provided organization and clandestine networks.

Republican leaders attempted to secure support within the armed forces.

The navy was particularly important.

Lisbon itself was crucial.

A revolution might succeed in the capital before monarchist forces elsewhere could react effectively.

The conspirators prepared to move.

The date would be early October.

13. October 3, 1910

The revolution was initially planned to begin during the night of October 3 to 4.

But conspiracies are rarely orderly.

Confusion spread.

Some military units failed to join.

Others hesitated.

Communications broke down.

One of the leading republican military figures, Admiral Cândido dos Reis, became convinced that the revolt had failed.

In despair, he took his own life.

At that moment, the revolution appeared close to collapse.

But one group refused to give up.

14. Machado Santos

At the center of the surviving insurrection stood Machado Santos, a naval officer who would later become known as one of the principal military figures of the revolution.

Republican forces established themselves around the Rotunda, the area around today’s Praça do Marquês de Pombal.

Their position became the symbolic center of resistance.

Government troops confronted them.

Many expected the insurgents to be defeated.

Machado Santos remained.

The revolution survived the night.

15. The Rotunda

Barricades were erected.

Armed civilians joined revolutionary soldiers.

Artillery was positioned.

Government forces attempted to contain the uprising.

The situation remained uncertain.

Lisbon residents watched events unfold around them.

Some stayed indoors.

Others joined crowds.

Rumors circulated constantly.

Who controlled the city?

Was the king still in Lisbon?

Had the revolution failed?

Had the Republic already won?

For many hours, nobody knew.

16. The Navy Joins the Revolution

The balance changed dramatically when important elements of the Portuguese navy supported the republican uprising.

Warships in the Tagus became central to the confrontation.

Among the vessels associated with the revolutionary forces were the cruisers Adamastor and São Rafael.

Their guns gave the insurgents something street fighters alone could never provide.

Heavy firepower.

Naval support made the revolutionary position much more dangerous for the government.

The capital was no longer facing only barricades.

It was confronting armed ships.

17. The Bombardment

Naval guns were used against positions associated with the monarchy and government.

The sound of artillery echoed through Lisbon.

The psychological effect was considerable.

The monarchy’s defenders faced growing uncertainty about the loyalty of military forces.

Revolutions often turn not simply when one side becomes overwhelmingly stronger, but when the other side begins to doubt whether it can still rely on its institutions.

That process was now unfolding in Lisbon.

18. King Manuel Leaves Lisbon

King Manuel II was at the Palace of Necessidades when the revolution began.

As the situation deteriorated, remaining in Lisbon became increasingly dangerous.

The young king left the capital.

He travelled to Mafra.

From there, events moved rapidly toward exile.

The royal family eventually reached Ericeira, on the Atlantic coast.

A royal yacht, the Amélia, took them away.

The king initially hoped circumstances might permit a different outcome.

They did not.

Manuel II would never again reign in Portugal.

19. October 5, 1910

By the morning of October 5, resistance to the revolution was collapsing.

What had begun as a precarious uprising had become a regime change.

Republican leaders moved to Lisbon’s municipal headquarters.

At approximately nine in the morning, the Republic was proclaimed from the balcony of the Paços do Concelho.

Crowds gathered below.

The monarchy was declared finished.

The Republic had arrived.

20. José Relvas

One of the figures most closely associated with the proclamation was José Relvas.

Standing at the balcony of Lisbon’s municipal building, he announced the new political order before the assembled crowd.

The moment became one of the defining images of Portuguese republican history.

A government was immediately required.

Revolution had removed the monarchy.

Now republicans had to create a state.

21. Teófilo Braga

A provisional government was established under Teófilo Braga, a scholar, writer and prominent republican.

The new regime faced enormous tasks.

Establish political authority.

Reorganize institutions.

Secure military loyalty.

Gain international recognition.

Write a new constitution.

Define relations between church and state.

Create republican symbols.

And persuade the country that a revolution centered largely in Lisbon represented Portugal as a whole.

22. A New Flag

Political revolutions frequently create new symbols.

Portugal was no exception.

The monarchy’s blue-and-white flag was replaced.

The new republican flag used green and red.

At its center appeared the Portuguese coat of arms over an armillary sphere.

The colors became inseparable from the identity of republican Portugal.

The flag adopted after the revolution remains the national flag of Portugal today.

23. A Portuguesa

The revolution also transformed a protest song into a national symbol.

A Portuguesa, composed by Alfredo Keil, with lyrics by Henrique Lopes de Mendonça, had emerged from the nationalist anger surrounding the British Ultimatum.

Under the Republic it became Portugal’s national anthem.

A song born from imperial humiliation had become the anthem of a new political regime.

The connection reveals how deeply the memory of 1890 remained embedded in Portuguese republican culture.

24. The Republic and the Catholic Church

One of the most consequential changes concerned religion.

Portugal had been a deeply Catholic country for centuries.

The monarchy and Catholic Church were historically intertwined.

Many republicans regarded clerical influence as an obstacle to modernization.

The new government therefore pursued an aggressively secular programme.

Religious orders faced restrictions.

Church property and institutions were affected.

Civil marriage and other secular measures expanded.

In 1911, the Law of Separation of Church and State formalized a new relationship between political authority and religion.

These policies gained support among anticlerical republicans.

They also created significant opposition.

25. The Constitution of 1911

Portugal required a republican constitution.

A constituent assembly produced one in 1911.

The new constitutional order established a parliamentary republic.

The presidency replaced the monarchy as the head of state.

Parliament occupied a central role.

Manuel de Arriaga became the first constitutionally elected president of the Portuguese Republic.

The old kingdom had been replaced institutionally as well as symbolically.

But constitutional design could not eliminate political conflict.

26. A Republic of Great Expectations

Republicans had promised regeneration.

Education.

Citizenship.

Modernization.

National renewal.

Secularism.

Political reform.

Many genuinely believed the Republic would allow Portugal to overcome the weaknesses they associated with the monarchy.

Educational reform became especially important.

Republican leaders regarded literacy and schooling as essential to citizenship.

But the new regime inherited many of the country’s structural problems.

Poverty did not disappear.

Financial difficulties remained.

Political divisions continued.

27. Political Instability

The First Republic became extraordinarily unstable.

Parties fragmented.

Governments rose and fell.

Presidents confronted political crises.

Military interventions occurred.

Political violence remained part of public life.

Between 1910 and 1926, Portugal experienced a remarkable succession of governments.

This instability cannot be explained by one cause.

It reflected ideological divisions, weak party structures, economic difficulties, social conflict, military intervention and the enormous disruption created by the First World War.

28. Portugal and the First World War

When the First World War began in 1914, Portugal initially remained outside direct European combat.

But tensions with Germany developed, particularly around Portuguese colonial territories in Africa.

In 1916, Germany declared war on Portugal.

Portuguese troops were sent to France as the Corpo Expedicionário Português, the Portuguese Expeditionary Corps.

Portugal also fought in Africa.

The war placed enormous pressure on the young Republic.

Casualties.

Inflation.

Shortages.

Political conflict.

Public dissatisfaction.

The promise of republican renewal was increasingly confronted by wartime reality.

29. Sidónio Pais

In December 1917, Sidónio Pais seized power.

His regime attempted to construct a different political system, more presidential and authoritarian than the parliamentary republic established in 1911.

Supporters called him the “President-King”.

His rule demonstrated how unstable the republican constitutional order had become.

In December 1918, Sidónio Pais was assassinated at Lisbon’s Rossio railway station.

Portugal entered another political crisis.

30. The Monarchy Tries to Return

The monarchy was gone, but monarchism had not disappeared.

In 1919, monarchists briefly proclaimed the restoration of the monarchy in northern Portugal.

The episode became known as the Monarquia do Norte, the Monarchy of the North.

It collapsed after only a few weeks.

The Republic survived.

But the episode demonstrated that the political settlement created in October 1910 was not yet universally accepted.

31. Manuel II in Exile

The former king settled in Britain.

Manuel II lived much of the remainder of his life at Fulwell Park, near London.

He remained interested in Portuguese affairs but never regained the throne.

He also became an important collector and scholar of Portuguese books and manuscripts.

When he died in 1932 without children, the direct line associated with his branch of the Braganza dynasty ended.

The young king driven from Lisbon in 1910 had spent more than two decades in exile.

32. The Republic Falls

By the mid-1920s, dissatisfaction with parliamentary politics had grown considerably.

On May 28, 1926, a military uprising began.

The First Republic collapsed.

A military dictatorship followed.

Eventually, António de Oliveira Salazar emerged as the dominant political figure.

In 1933, the Estado Novo was formally established.

The authoritarian regime would survive until 1974.

Thus the republic created in October 1910 did not lead in a straight line to modern Portuguese democracy.

Portugal’s political journey would be far more complicated.

33. April 25, 1974

Nearly sixty-four years after the republican revolution, another military-led uprising transformed Portugal.

The Carnation Revolution of April 25, 1974 overthrew the Estado Novo.

Unlike the events of October 1910, the revolution of 1974 eventually produced the democratic constitutional system that governs Portugal today.

This creates an important distinction in Portuguese history.

October 5 represents the overthrow of the monarchy and establishment of republican government.

April 25 represents the overthrow of dictatorship and the path toward contemporary democracy.

Both dates transformed Portugal.

But they transformed it in different ways.

34. Why Portugal Remained a Republic

The First Republic collapsed in 1926.

Yet the monarchy was not restored.

Even the authoritarian Estado Novo maintained republican institutions in formal terms.

Portugal continued to have presidents rather than kings.

The revolution of 1910 therefore achieved one permanent constitutional transformation.

The monarchy never returned.

Political systems changed repeatedly.

But Portugal remained a republic.

35. October 5 as a National Symbol

October 5 became the date associated with the establishment of the Portuguese Republic.

Today it is commemorated as Implantação da República, the Establishment of the Republic.

The date remains one of Portugal’s national holidays.

Its significance is larger than the political success or failure of the First Republic itself.

It marks the moment when the Portuguese state permanently abandoned monarchy.

A political institution that had existed in various forms for centuries disappeared within a few extraordinary days.

36. Was the Revolution Inevitable?

It is tempting to read history backward.

The monarchy fell, therefore it must have been doomed.

But history rarely works that way.

The revolution initially appeared dangerously close to failure.

Important military units did not support it.

Cândido dos Reis believed the uprising had collapsed.

Government forces still existed.

The king had supporters.

Had events at the Rotunda unfolded differently, or had naval support failed to materialize, October 1910 might have ended very differently.

The Republic was not inevitable.

It was the product of political conditions combined with decisions made during a highly uncertain revolutionary crisis.

37. A Lisbon Revolution

Another important qualification concerns geography.

The decisive events took place primarily in Lisbon.

Republican strength was particularly concentrated in the capital.

Portugal beyond Lisbon did not necessarily experience the revolution in the same way.

Some areas remained conservative and monarchist.

Others accepted the new government once it became clear that the monarchy had collapsed.

This distinction matters because the proclamation of a new regime in the capital and the transformation of political culture across an entire country are not the same process.

The latter takes much longer.

38. The Revolution’s Contradictions

October 5 contains many of the contradictions characteristic of modern revolutions.

It promised political renewal but produced instability.

It expanded secular institutions but created new social divisions.

It celebrated citizenship while political participation remained limited by the standards of later democracy.

It overthrew a monarchy criticized as incapable of reform but inherited many of the same economic and social problems.

It created symbols that survive today even though the political system that created them disappeared in 1926.

The Portuguese Republic outlived the First Republic.

That distinction is fundamental.

39. Why October 5 Matters

October 5, 1910 changed Portugal permanently.

The monarchy ended.

The king went into exile.

Republican institutions replaced royal government.

A new flag emerged.

A new national anthem was adopted.

Church-state relations were transformed.

A new constitution followed.

Portugal entered a period of intense political experimentation.

The revolution did not solve the country’s problems.

Nor did the First Republic become the stable democratic order its supporters had hoped to construct.

But one transformation endured.

Portugal would never again be ruled by a king.

October 5, 1910: The Morning the Monarchy Ended

Imagine Lisbon shortly after sunrise.

Smoke hangs over parts of the city.

Barricades remain in the streets.

Ships sit in the Tagus.

The sound of gunfire that had dominated the previous hours begins to fade.

The king is gone.

Government authority is collapsing.

People move toward the center of the city.

At the Paços do Concelho, republican leaders appear above the crowd.

Then comes the proclamation.

Portugal is a Republic.

For generations, Portuguese political life had revolved around a crown.

Kings had ruled during the age of exploration.

Kings had governed an empire stretching across oceans.

Kings had survived invasion, civil war, revolution and constitutional transformation.

Then, in October 1910, the institution disappeared with astonishing speed.

A twenty-year-old king sailed into exile.

A green-and-red flag replaced the royal colors.

A Portuguesa would replace the royal anthem.

And a country whose history had been inseparable from monarchy for centuries began learning what it meant to call itself a republic.

On October 5, 1910, Portugal did not merely change governments. It changed regimes.

And despite everything that followed, that particular revolution was never reversed.