Ο Κορνέλις φαν Χάαρλεμ γεννήθηκε στο [[Χάαρλεμ]] το 1562<ref name=db>[https://www.deutsche-biographie.de/sfz98723.html#adbcontent Deutsche Biographie: ''Haarlem, Cornelis van'']</ref> σε ευκατάστατη οικογένεια<ref name=get>[http://www.getty.edu/art/collection/artists/855/cornelis-cornelisz-van-haarlem-dutch-1562-1638/ Getty Museum: ''Cornelis Cornelisz van Haarlem'']</ref> Όταν η οικογένειά του διέφυγε από το Χάαρλεμ το 1572 λόγω της πολιορκίας της πόλης από τα ισπανικά στρατεύματα, ο μικρός Κορνέλις παρέμεινε στην πόλη<ref name=reik>[https://www.rijksmuseum.nl/en/rijksstudio/artists/cornelis-cornelisz.-van-haarlem [[Ρέικσμουζεουμ]]: ''Cornelis Cornelisz van Haarlem'']</ref>, όπου και εκπαιδεύτηκε αρχικά από τον [[Πίτερ Πίτερς ο πρεσβύτερος|Πίτερ Πίτερς τον πρεσβύτερο]]<ref name=RKD1>[http://www.rkd.nl/rkddb/dispatcher.aspx?action=search&database=ChoiceArtists&search=priref=63453 Pieter Pietersz] στο [[RKD]]</ref>, τον γιο του επιλεγόμενου και ''Lange Pier'' [[Πίτερ Έρτσεν]].<ref name=db/> και αργότερα μετέβη στην [[Αμβέρσα]], όπου διετέλεσε μαθητής του [[Χίλλις Κουανιέ]]<ref name=RKD>[http://www.rkd.nl/rkddb/dispatcher.aspx?action=search&database=ChoiceArtists&search=priref=18412 Cornelis Cornelisz. van Haarlem]
in the [[RKD]]</ref> για ένα χρόνο,<ref name=epl>[https://www.nationalgallery.org.uk/artists/cornelis-van-haarlem National Gallery, London: ''Cornelis van Haarlem'']</ref> έχοντας πρώτα επισκεφθεί τη [[Ρουέν]] στη [[Γαλλία]] το 1579.<ref name=get/> Στη συνέχεια, περί το 1581-82, επέστρεψε στο Χάαρλεμ, όπου έζησε ολόκληρη την υπόλοιπη ζωή του.
[[File:Cornelis_Cornelisz._van_Haarlem_-_The_Fall_of_the_Titans_-_Google_Art_Project.jpg|thumb|''[[The Fall of the Titans]]'' (1588–1590)]]
Born in [[Haarlem]], Cornelis Corneliszoon was a pupil of [[Pieter Pietersz]] in Haarlem, and later [[Gillis Coignet]] in [[Antwerp]]. He is known among art historians as a member of the [[Haarlem Mannerists]], who were highly influenced by the work of [[Bartholomeus Spranger]], whose drawings were brought to Haarlem by [[Carel van Mander]] in 1585, and had a strong immediate
effect.<ref name="Slive, 8">Slive, 8</ref> He painted mainly portraits as well as [[mythological]] and [[Biblical]] subjects. Initially Cornelis Cornelisz painted large-size, highly stylized works with Italianate nudes in twisted poses with a grotesque, unnatural anatomy. Later, his style changed to one based on the [[Netherlandish]] realist tradition.
When his parents fled [[Haarlem]] in 1568, as the Spanish army laid siege to the city during the [[Eighty Years' War]], Cornelis Cornelisz remained behind and was raised by the painter [[Pieter Pietersz the Elder]], his first teacher. Later, in 1580-1581 Corneliszoon studied in [[Rouen]], [[France]], and [[Antwerp]] (with Coignet), before returning to Haarlem, where he stayed the rest of his life. He became a respected member of the community and in 1583 he received his first official commission from the city of Haarlem, a militia company portrait, the Banquet of the Haarlem Civic Guard. He later became city painter of Haarlem and received numerous official commissions. As a portrait painter, both of groups and individuals, he was an important influence on Frans Hals. He married Maritgen Arentsdr Deyman, the daughter of a mayor of Haarlem, sometime before 1603. In 1605, he inherited a third of his wealthy father-in-law's estate.
[[File:Cornelis van Haarlem - Banket van de officieren van de St. Jorisdoelen.jpg|thumb|''Banquet of the Officers of the Company of St. George'' (1599)]]
Together with Carel van Mander, [[Hendrick Goltzius]] and other artists, he started an informal drawing school that has become known in art history circles as the [[Haarlem Academy]] or "Haarlem Mannerists". Probably this was a very informal grouping, perhaps meeting to draw nude models, and certainly to exchange artistic views.<ref name="Slive, 8"/> Corneliszoon also played a role in the failed attempt to make a new charter for the [[Haarlem Guild of St. Luke]] in 1630, which tried to raise the status of the artists.
His registered pupils were [[Salomon de Bray]], [[Cornelis Jacobsz Delff]], [[Cornelis Engelsz]], and [[Gerrit Pietersz Sweelink]].<ref name=RKD/> Among his students was [[Cornelis Claesz Heda]] (brother of [[Willem Claeszoon Heda]]), who seems to have exported Cornelisz' particular brand of mannerism to India, where he was active at the court of the sultan of [[Adil Shahi|Bijapur]].<ref>Gijs Kruijtzer,[http://hdl.handle.net/1887/13850 Xenophobia in Seventeenth-Century India] (Leiden: Leiden University Press, 2009), 21</ref>
Paintings by him are on display at the [[Frans Hals Museum]] in Haarlem, the [[Rijksmuseum]] in [[Amsterdam]], the [[Louvre]] in [[Paris]], the [[National Gallery]] in [[London]], the [[Hermitage Museum|Hermitage]] in [[St. Petersburg]] and other museums.