The year 1643 is the 43rd year in the 17th century according to the Christian era.
January 15 - Flooding of the Meuse - The village of Obbicht is completely washed away after a dike breach after the water level of the Meuse has risen to record high.
21 - Abel Tasman is the first European to visit Tongatapu, the main island of Tonga.februari6 - Abel Tasman is the first European to visit the Fiji Islands.
25 - Willem Kieft, governor of New Netherland, orders a punitive expedition among the Native Americans in the colony. That is the beginning of the War of Kieft. April 4 to November 18 - Maarten Gerritsz. de Vries, in search of the "gold and silver islands", maps the coasts of Hokkaido, the Kuril Islands, Sakhalin and other islands.mei14 - Louis XIII of France dies. Anna of Austria, his wife, becomes regent for her five-year-old son Louis XIV. Like her husband, she is guided by the Prime Minister, Cardinal Mazarin.
19 - Battle of Rocroi as part of the Thirty Years' War. The troops of the governor Francisco de Melo had invaded northern France to relieve the southern front for Spain. In the French Ardennes, they are surprisingly defeated by the Prince of Condé. undated The barometer was invented by Evangelista Torricelli. This physicist also formulates Torricelli's Law, named after him.
The Turkish monarch and historian Abu'l Ghazi Bahadoer becomes Khan of China.
The first two volumes of the Acta Sanctorum by the Jesuits Bolland and Henscher appear in Antwerp.
Joost van den Vondel writes the poem Aen de Beurs van Amsterdam
January4 - Isaac Newton, British physicist, philosopher, mathematician, astronomer, theologian and alchemist (died 1727)August21 - Alfons VI of Portugal, king from 1656 to 1683 (died 1683)date unknownMarc-Antoine Charpentier, French composer (died 1704)
February 15 - Juliana of Nassau-Siegen (55), German Landgravine March1 - Girolamo Frescobaldi (59), Italian composer and organistMay14 - Louis XIII (41), King of FranceNovember29 - Claudio Monteverdi (76), Italian composer, conductor