Frans Hals (c. 1580 - August 26, 1666) was a Dutch painter during the Dutch Golden Age. As a portrait painter, considered by some as second in Holland only to Rembrandt, he displayed extraordinary talent and quickness in his art. Wikipedia
The definitive Wikipedia entry for Frans Hals. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Frans_Hals
Web Gallery of Art, image collection, virtual museum and searchable database of European fine arts (painting, sculpture) of the Gothic, Renaissance, Baroque, Neoclassicism and Romanticism periods (1100-1850), containing over 18.400 reproductions. Biograph www.wga.hu/index1.html