When was the Dutch artist who was part of Art Concret born?
Theo van Doesburg Theo van Doesburg (] , 30 August 1883 – 7 March 1931) was a Dutch artist, who practiced painting, writing, poetry and architecture. He is best known as the founder and leader of De Stijl.
Jean Dulieu Jan van Oort (13 April 1921 in Amsterdam – 29 November 2006 in Arnhem) was a Dutch children's book writer and comic strip cartoonist, working under the pseudonym of Jean Dulieu. He is known for his creation of "Paulus the woodgnome".