1143 King Alfonso VII of Leon recognises Portugal as a Kingdom.
1147 The Portuguese, under Afonso I, and Crusaders from England and Flanders conquer Lisbon after a four-month siege.
1325 Alfonso IV becomes King of Portugal.
1373 Anglo-Portuguese Alliance between England (succeeded by the United Kingdom) and Portugal is the oldest alliance in the world which is still in force.
1383 The 1383-1385 Crisis in Portugal: King Fernando dies without a male heir to the Portuguese throne, sparking a period of civil war and disorder.
1484 Portuguese sea captain Diogo Cão finds the mouth of the Congo River.
1488 Bartolomeu Dias of Portugal lands in Mossel Bay after rounding the Cape of Good Hope, becoming the first known European to travel so far south.
1493 Explorer Christopher Columbus arrives back in Lisbon, Portugal, aboard his ship Niña from his voyage to what is now The Bahamas and other islands in the Caribbean.
1493 Pope Alexander VI divides the New World between Spain and Portugal along the Line of Demarcation.
1494 Spain and Portugal sign the Treaty of Tordesillas which divides the New World between the two countries.
1497 Vasco da Gama rounds the Cape of Good Hope, the point where Bartolomeu Dias had previously turned back to Portugal.
1498 Portuguese explorer Vasco da Gama arrives at Kozhikode (previously known as Calicut), India.
1498 Vasco da Gama decides to depart Calicut and return to Portugal.
1500 Portuguese navigator Pedro Álvares Cabral becomes the first European to sight Brazil.
1502 Vasco da Gama sets sail from Lisbon, Portugal, on his second voyage to India.
1502 The island of Saint Helena is discovered by the Portuguese explorer João da Nova.
1509 The Battle of Diu takes place near Diu, India, between Portugal and Turkey.
1509 The Battle of Diu, between Portugal and the Ottoman Empire takes place in Diu, India.
1511 Afonso de Albuquerque of Portugal conquers Malacca, the capital of the Sultanate of Malacca.
1517 Seven Portuguese armed vessels led by Fernão Pires de Andrade meet Chinese officials at the Pearl River estuary.
1520 After navigating through the South American strait, three ships under the command of Portuguese explorer Ferdinand Magellan reach the Pacific Ocean, becoming the first Europeans to sail from the Atlantic Ocean to the Pacific.
1529 Treaty of Saragossa divides the eastern hemisphere between Spain and Portugal along a line 297.5 leagues or 17° east of the Moluccas.
1531 Lisbon, Portugal is hit by an earthquake--thousands die.
1541 Francis Xavier leaves Lisbon on a mission to the Portuguese East Indies.
1542 Portuguese under Christovão da Gama capture a Moslem-occupied hill fort in northern Ethiopia in the Battle of Baçente.
1542 Navigator João Rodrigues Cabrilho of Portugal arrives at what is now San Diego, California, United States.
1580 Battle of Alcântara. Spain defeats Portugal.
1582 Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar, this day is skipped in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar, this day is skipped in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
1582 Pope Gregory XIII implements the Gregorian calendar. In Italy, Poland, Portugal, and Spain, October 4 of this year is followed directly by October 15.
1641 Battle of Mbororé: Guaranís from Jesuit Reductions fight Bandeirantes, and Portuguese explorers after separation of the Kingdoms of Spain and Portugal.
1661 The Treaty of The Hague is signed by Portugal and the Dutch Republic.
1665 Battle of Ambuila, where Portuguese forces defeated the forces of the Kingdom of Kongo and decapitated king Antonio I of Kongo, also called Nvita a Nkanga.
1668 Spain recognizes Portugal as an independent nation.
1703 Portugal and England sign the Methuen Treaty which gives preference to Portuguese imported wines into England.
1707 John V is crowned King of Portugal.
1755 Lisbon earthquake: In Portugal, Lisbon is destroyed by a massive earthquake and tsunami, killing between sixty thousand and ninety thousand people.
1803 Colégio Militar is founded in Portugal by Colonel Teixeira Rebello.
1808 Battle of Vimeiro: British and Portuguese forces led by General Arthur Wellesley defeat French force under Major-General Jean-Andoche Junot near the village of Vimeiro, Portugal, the first Anglo-Portuguese victory of the Peninsular War.
1811 Peninsular War: The allies Spain, Portugal and Britain, defeat the French at the Battle of Albuera.
1812 Battle of Badajoz (March 16 – April 6) – British and Portuguese forces besiege and defeat French garrison during Peninsular War.
1820 Constitutionalist insurrection at Oporto, Portugal.
1820 Constitutionalist revolution in Lisbon, Portugal.
1822 Dom Pedro I declares Brazil independent from Portugal on the shores of the Ipiranga creek in São Paulo.
1825 Portugal recognizes the Independence of Brazil.
1833 Admiral Charles Napier defeats the navy of the Portuguese usurper Dom Miguel at the third Battle of Cape St. Vincent.
1874 Aires de Ornelas e Vasconcelos is appointed the Archbishop of the Portuguese colonial enclave of Goa.
1887 Coimbra Academic Association, the oldest students' union in Portugal, is founded.
1891 The first attempt at a Portuguese republican revolution breaks out in the northern city of Porto.
1910 In a revolution in Portugal the monarchy is overthrown and a republic is declared .
1926 28th May 1926 coup d'état: Ditadura Nacional is established in Portugal to suppress the unrest of the First Republic.
1946 Dr. Ram Manohar Lohia, a Socialist, calls for a Direct Action Day against the Portuguese in Goa. A road is named after this date in Panjim.
1955 Albania, Austria, Bulgaria, Cambodia, Finland, Hungary, Ireland, Italy, Jordan, Laos, Libya, Nepal, Portugal, Romania, Spain and Sri Lanka join the United Nations.
1961 CONCP is founded in Casablanca as a united front of African movements opposing Portuguese colonial rule.
1973 Guinea-Bissau declares its independence from Portugal.
1974 Carnation Revolution: A leftist military coup in Portugal overthrow the ''Estado Novo'' regime.
1974 Portugal and the Soviet Union establish diplomatic relations.
1974 Guinea-Bissau gains independence from Portugal.
1974 The Aliança Operário-Camponesa (Worker-Peasant Alliance) is founded in Portugal, as a front of PCP(m-l).
1975 Cape Verde gains its independence from Portugal.
1975 São Tomé and Príncipe declare independence from Portugal.
1975 Formation of a military triumvirate in Portugal.
1975 East Timor declares its independence from Portugal.
1976 Portugal grants autonomy to Madeira.
1976 Jaime Ornelas Camacho takes office as the first President of the Regional Government of Madeira, Portugal.
1986 The Kingdom of Spain and the Portuguese Republic are admitted into the European Community.
1987 Portugal and the People's Republic of China sign an agreement in which Macau would be returned to China in 1999.
1989 An Independent Air Boeing 707 crashes into Santa Maria mountain in Azores Islands off the coast of Portugal, killing 144.
1999 Macau is handed over to the People's Republic of China by Portugal.
2001 Hintze Ribeiro disaster, a bridge collapses in northern Portugal, killing up to 70 people.
2002 The independence of East Timor is recognized by Portugal, formally ending 23 years of Indonesian rule and 3 years of provisional UN administration (Portugal itself is the former colonizer of East Timor until 1976).