1644

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• January 22 – The Royalist Oxford Parliament is first assembled by King Charles I of England.{{cite book | last = Braddick | first = Michael J. | title = The Oxford handbook of the English revolution | publisher = Oxford University Press | location = Oxford, UK; New York | year = 2015 | isbn = 9780199695898 | page=103| language=en}}
• January 26 – First English Civil War: Battle of Nantwich – The Parliamentarians defeat the Royalists, allowing them to end the 6-week siege of the Cheshire town.{{cite book | last = Coward | first = Barry | title = The Stuart age: England, 1603-1714 | publisher = Longman | location = London New York | year = 1994 | isbn = 9780582067226 | page=223 | language=en}}
• January 30
• Dutch explorer Abel Tasman departs from Batavia in the Dutch East Indies (modern-day Jakarta in Indonesia) on his second major expedition for the Dutch East India Company, to map the north coast of Australia. Tasman commands three ships, Limmen, Zeemeeuw and Braek, and returns to Batavia at the beginning of August with no major discoveries.
• Battle of Ochmatów: Polish–Lithuanian Commonwealth forces under hetman Stanisław Koniecpolski secure a substantial victory over the horde of Crimean Tatars under Tugay Bey.
• February 5 – The first livestock branding law in America is passed in Connecticut.{{cite web|url=http://www.hisdates.com/years/1644-historical-events.html|title=What Happened In 1644|publisher=hisdates.com|access-date=2016-03-03}}
• March 24 – Roger Williams is granted an official grant for his Rhode Island Colony from the Parliament of England, allowing the establishment of a general assembly.

• April 18 – Opchanacanough leads the Powhatan Indians in an unsuccessful uprising against the English at Jamestown. Although 300 of the English colonists are slain, the settlers pursue Opchanacanough, who is imprisoned in Jamestown for the rest of his life.Edward S. Ellis, et al., The People's History of the World; Including Two Volumes on the Races of Mankind, Volume 5: United States (Chicago: The History Publishing Association, 1902) p. 127 ("The second outbreak occurred April 18th, 1644... Opechankano was taken prisoner, and died in Jamestown while a captive") This is the last such Indian rebellion in the region.
• April 25 – A popular Chinese rebellion led by Li Zicheng sacks Beijing, prompting Chongzhen, the last emperor of the Ming dynasty, to commit suicide.
• May 6 – Johan Mauritius resigns as Governor of Brazil.
• May 25 – Ming general Wu Sangui forms an alliance with the invading Manchus and opens the gates of the Great Wall of China at Shanhaiguan Pass, letting the Manchus through towards the capital Beijing.
• May 26 – Battle of Montijo: The Kingdom of Portugal is victorious over Habsburg Spain, in the first major action between the two nations during the Portuguese Restoration War.
• May 27 – Battle of Shanhai Pass: The Manchu Qing dynasty and Wu Sangui gain a decisive victory over Li Zicheng's Shun dynasty.
• June 3 – Li Zicheng proclaims himself emperor of China.
• June 6 – The invading Qing army, with the help of Ming general Wu Sangui, captures Beijing in China, marking the beginning of Manchu rule over China proper.
• June 11 – During the English Civil War, Prince Rupert and his men take Liverpool Castle."Rupert, Prince", by Charles Harding Firth, in The Dictionary of National Biography, Volume 17 (Oxford University Press, 1922) p. 408 ("Rupert returned to Wales.. Defeating the parliamentarians at Stockport, he forced his way into Lancashire, stormed Bolton on 28 May, and captured Liverpool on 11 June", quoting Ormerod, Civil War Tracts of Lancashire, p. 187) Liverpool is later reclaimed by Sir John Moore.

• July 1 – Torstenson War: Battle of Colberger Heide – The Dano-Norwegian and Swedish fleets fight a naval battle off the coast of Schleswig-Holstein. The battle is indecisive but represents a minor success for the Dano-Norwegian fleet.
• July 2 – English Civil War: Battle of Marston Moor – The Parliamentarians crush the Royalists in Yorkshire, ending Charles I's hold on the north of England.{{cite book | last = Levene | first = Mark | title = The massacre in history | publisher = Berghahn Books | location = New York | year = 1999 | isbn = 9781571819345 | page=93 | language=en}}
• September 1 – English Civil War: Battle of Tippermuir – Montrose defeats Lord Elcho's Covenanters, reviving the Royalist cause in Scotland.
• September 2 – English Civil War: Second Battle of Lostwithiel (in Cornwall) – Charles I and the Royalists gain their last major victory.{{cite book|author=Jeremy Black|title=The Cambridge Illustrated Atlas of Warfare: Renaissance to Revolution, 1492-1792|publisher=Cambridge University Press|year=1996|page=80}}
• September 15 – Pope Innocent X succeeds Pope Urban VIII, becoming the 236th pope.{{cite book | last = Levillain | first = Philippe | title = The papacy : an encyclopedia | publisher = Routledge | location = New York | year = 2002 | isbn = 9780415922289 | page=801 | language=en}}

• October 1 – The Jews of Mogilev, Polish–Lithuanian Commonwealth, are attacked during Tashlikh.
• November 8 – The Shunzhi Emperor, the second emperor of the Qing dynasty, is enthroned in Beijing after the collapse of the Ming dynasty as the first Qing emperor to rule over China proper.
• November 23
• Battle of Jüterbog (December 3 New Style): Sweden's forces defeat those of the Holy Roman Empire.
• Areopagitica, an appeal for freedom of speech written by John Milton, is published in London.
• November – The Castle of Elvas in Portugal resists a 9-day siege by the Spanish during the Portuguese Restoration War.
• December 8 (December 18 New Style) – As Christina comes of age, she is made ruling queen of Sweden.
• December – Bubonic plague breaks out in Edinburgh (Scotland).

• A Spanish officer is murdered in St. Dominic's Church, Macau during mass by colonists loyal to Portugal during the Portuguese Restoration War.
• Sigismund's Column is erected in Warsaw to commemorate King Sigismund III Vasa, who moved the capital of Poland from Kraków to Warsaw in 1596.
• Philosopher René Descartes publishes Principia Philosophiae (Principles of Philosophy) in Amsterdam.
• The opera Ormindo is first performed in Venice (music by Francesco Cavalli, and libretto by Giovanni Faustini).
• The West India Company{{which|date=June 2020}} displays greater interest in profit than in colonization.{{vague|date=June 2020}}

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• January 9 – Robert Gibbes, English-born landgrave in South Carolina (d. 1715)
• January 10
• Louis François, duc de Boufflers, Marshal of France (d. 1711)
• Celestino Sfondrati, Italian Catholic cardinal (d. 1696)
• January 11 – Hayashi Hōkō, Japanese philosopher (d. 1732)
• January 14 – Thomas Britton, English concert promoter (d. 1714)
• January 18 – John Partridge, English astrologer (d. 1708)
• January 23 – Jonas Budde, Norwegian army officer (d. 1710)
• January 25 – Antoine Thomas, Jesuit missionary priest and astronomer (d. 1709){{cite book | last = Walle | first = Willy | title = The history of the relations between the Low Countries and China in the Qing era (1644-1911 | publisher = Leuven University Press Ferdinand Verbiest Foundation | location = Leuven, Belgium | year = 2003 | isbn = 9789058673152 | page=90}}
• January 26 – Thomas Boylston, American colonial doctor (d. 1695)
• February 2
• Isaac Chayyim Cantarini, Italian rabbi (d. 1723)
• Johannes Hancke, German writer (d. 1713)
• February 7 – Nils Bielke, member of the High Council of Sweden (d. 1716)
• February 8 – Pierre de La Broue, American bishop (d. 1720)
• February 12 – Jakob Ammann, Swiss founder of the Amish sect (d. 1712)
• February 24 – Maria Elisabeth Lämmerhirt, German mother of Johann Sebastian Bach (d. 1694)
• March 1 – Simon Foucher, French polemicist (d. 1696)
• March 15 – Veit Hans Schnorr von Carolsfeld, German iron and cobalt magnate (d. 1715)
• March 21 – Sir Walter Bagot, 3rd Baronet, English politician (d. 1704)
• March 22
• Otto Mencke, German philosopher and scientist (d. 1707)
• Sir James Rushout, 1st Baronet, English politician (d. 1698)
• March 25 – Heinrich von Cocceji, German jurist from Bremen (d. 1719)
• March 31 – Henry Winstanley, English engineer (d. 1703)

• April 6 – António Luís de Sousa, 2nd Marquis of Minas, Portuguese general, governor-general of Brazil (d. 1721)
• April 7
• Nathaniel Johnson, American politician (d. 1713)
• François de Neufville, duc de Villeroy, French soldier (d. 1730)
• April 11 – Marie Jeanne Baptiste of Savoy-Nemours, Duchess of Savoy (d. 1724)
• April 17 – Abraham Storck, Dutch painter (d. 1708)
• April 21 – Conrad von Reventlow, Danish statesman, first Grand Chancellor of Denmark (d. 1708)
• May 2 – Robert Cotton, English politician (d. 1717)
• May 4 – Juan Caballero y Ocio, Spanish priest remarkable for lavish gifts to the Catholic Church and charity (d. 1707)
• May 5 – Sir Richard Newdigate, 2nd Baronet, English landowner (d. 1710)
• May 26 – Michael Ettmüller, German physician (d. 1683)
• June 2 – William Salmon, English medical writer (d. 1713)
• June 7 – Johann Christoph Volkamer, German botanist (d. 1720)
• June 16 – Henrietta Anne Stuart, Princess of Scotland, England and Ireland and Duchess of Orléans (d. 1670){{cite book | last = Lowther | first = Kenneth | title = Dartmoor, Exeter... | publisher = Ward Lock | location = London | year = 1979 | isbn = 9780706357929 | page=35 | language=en}}
• June 17 – Johann Wolfgang Franck, German baroque composer (d. 1710)

• July 2 – Abraham a Sancta Clara, German Augustinian friar (d. 1709)
• July 4 – Josceline Percy, 11th Earl of Northumberland, English noble (d. 1670)
• July 7 – Joan Geelvinck, Dutch politician (d. 1707)
• July 10 – Miguel Bayot, Spanish Catholic prelate, Bishop of Cebu (from 1697) (d. 1700)
• July 22 – Peter Drelincourt, Irish chaplain (d. 1722)
• August 6
• Christian Ernst, Margrave of Brandenburg-Bayreuth (1655–1712) (d. 1712)
• Louise de La Vallière, French mistress of Louis XIV of France (d. 1710){{cite book | last = Dumas | first = Alexandre | title = The Vicomte de Bragelonne | publisher = Oxford University Press | location = Oxford New York | year = 1998 | isbn = 9780192834638 |page=674 | language=en}}
• August 12 – Heinrich Ignaz Franz Biber, Bohemian composer and violinist (d. 1704)
• August 28 (bapt.) – Gilles Schey, Dutch admiral (d. 1703)
• August 29 – Anne Bourdon, nun in New France (d. 1711)
• August 30 – Thomas Tufton, 6th Earl of Thanet, English politician (d. 1729)
• September 3 – Richard Newport, 2nd Earl of Bradford, English politician (d. 1723)
• September 6 – Juan Bautista Cabanilles, Spanish composer (d. 1712)
• September 11 – Jacob Rotius, Dutch painter (d. 1681)
• September 22 – Jacques Échard, French Dominican, historian of the Order (d. 1724)
• September 25 – Ole Rømer, Danish astronomer (d. 1710)

• October 1 – Jean Rousseau, French viol player (d. 1699)
• October 2 – François-Timoléon de Choisy, French abbé, author and cross-dresser (d. 1724)
• October 3 – Adriaen Frans Boudewijns, landscape painter (d. 1719)
• October 12 – Christopher Sandius, Dutch Arian writer (d. 1680)
• October 13 – Sipihr Shikoh, Mughal Emperor (d. 1708)
• October 14 – William Penn, English Quaker and founder of Pennsylvania (d. 1718)
• October 26 – Mathias Steuchius, Swedish archbishop (d. 1730)
• November 23 (bapt.) – Cornelia van der Gon, Dutch art collector (d. 1701)
• December 8 – Maria d'Este, Italian noble (d. 1684)
• December 9 – Robert Kirk, Scottish folklorist, Bible translator, Gaelic scholar (d. 1692)
• December 23 – Tomás de Torrejón y Velasco, Spanish composer, musician and organist (d. 1728)
• December 25 – Walter Scott, Earl of Tarras, Scottish nobleman (d. 1693)
• December 29 – Philips van Almonde, Dutch Lieutenant Admiral (d. 1711)

• Matsuo Bashō, Japanese poet (d. 1694)
• Pietro Erardi, Maltese chaplain and painter (d. 1727){{cite book|last1=Schiavone|first1=Michael J.|title=Dictionary of Maltese Biographies Vol. 1 A–F|date=2009|publisher=Pubblikazzjonijiet Indipendenza|location=Pietà|isbn=9789993291329|page=756}}
• Antonio Stradivari, Italian violin maker (d. 1737){{cite book | last = Fetis | first = FirstName | title = Anthony Stradivari the Celebrated Violin Maker | publisher = Dover Publications | location = Newburyport | year = 2013 | isbn = 9780486316529 | page=x}}

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• January 20 – Stefano Amadei, Italian painter (b. 1580)
• January 30 – William Chillingworth, controversial English churchman (b. 1602)
• January 31 – Georg II of Fleckenstein-Dagstuhl, German nobleman (b. 1588)
• February 28 – Guru Har Gobind, the Sixth Sikh Guru (b. 1595)
• March 15 – Countess Louise Juliana of Nassau, Regent of Bohemia (b. 1576)
• March 24 – Cecilia Renata of Austria, Queen of Poland (b. 1611)
• March 29 – Lord John Stewart, Scottish aristocrat, Royalist commander in the English Civil War (b. 1621)
• April 2 – Diego Salcedo, Spanish bishop (b. 1575)
• April 10 – Reverend William Brewster, English Pilgrim leader (b. 1567)
• April 25 – Chongzhen, last Ming Emperor of China (suicide) (b. 1611)
• April 28 – Zsófia Bosnyák, Hungarian noblewoman (b. 1609)
• May 26 – Alfonso III d'Este, Duke of Modena, Italian noble (b. 1591)
• June 17
• Anne de Montafié, Countess of Clermont-en-Beauvaisis, French countess (b. 1577)
• John of St. Thomas, Portuguese philosopher (b. 1589)
• July 4 – Brian Twyne, English archivist (b. 1581)
• July 7 – Hedwig of Hesse-Kassel, countess consort of Schaumburg (b. 1569)
• July 16 – Giovanni Biliverti, Italian painter (b. 1585)
• July 25 – Amar Singh Rathore, Rajput nobleman affiliated with the royal house of Marwar (b. 1613)
• July 29 – Pope Urban VIII (b. 1568){{cite book | last = Baker | first = Christopher | title = Absolutism and the scientific revolution, 1600-1720 : a biographical dictionary | publisher = Greenwood Press | location = Westport, Conn | year = 2002 | isbn = 9780313308277 | page=382 | language=en}}
• August 25 – Johann Heinrich Alting, German Lutheran theologian (b. 1583)
• September 4 – Johannes Wtenbogaert, Dutch leader of the Remonstrants (b. 1557)
• September 7
• Guido Bentivoglio, Italian statesman and historian (b. 1579){{cite book|author=John Evelyn|title=The Diary of John Evelyn: 1620-1649|publisher=Clarendon Press|year=2000|page=379}}
• Ralph Corbie, Irish Jesuit (b. 1598)
• September 8
• John Coke, English politician (b. 1563){{cite book | last = Venning | first = Timothy | title = Compendium of British office holders | publisher = Palgrave Macmillan | location = Houndmills, Basingstoke, Hampshire New York | year = 2005 | isbn = 9780230505872 | page=118 | language=en}}
• Francis Quarles, English poet (b. 1592){{cite book | last = Baker | first = Christopher | title = Absolutism and the scientific revolution, 1600-1720 : a biographical dictionary | publisher = Greenwood Press | location = Westport, Conn | year = 2002 | isbn = 9780313308277| page=313 }}
• October 6 – Elisabeth of France, queen of Philip IV of Spain (b. 1602)
• October 19 – Johann Friedrich, Count Palatine of Sulzbach-Hilpoltstein (b. 1587)
• October 30 – Jorge de Cárdenas y Manrique de Lara, Spanish noble (b. 1584)
• November 6 – Thomas Roe, English diplomat (b. c. 1581)
• November 10 – Luis Vélez de Guevara, Spanish writer (b. 1579)
• November 20 – Nathaniel Foote, American colonist (b. 1592)
• November 24 – Deodat del Monte, Flemish painter, architect (b. 1582)
• December 20 – Albert IV, Duke of Saxe-Eisenach (from 1640) (b. 1599)
• December 23 – Sir Alexander Carew, 2nd Baronet, English politician (b. 1609)
• December 28 – John Bankes, Attorney General and Chief Justice to King Charles I of England (b. 1589)
• December 30 – Jan Baptist van Helmont, Flemish chemist (b. 1577)

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Category:Leap years in the Gregorian calendar