When was the Dutch artist who was part of Art Concret born? 
30 August 1883
Title: Art Concret
Passage: Art Concret was an avant-garde group of artists formed in 1929 in Paris, France, championing a geometrical abstract art closely related to the aesthetics of Neo-plasticism.  It consisted of Otto G. Carlsund, Theo van Doesburg, Jean Hélion, Marcel Wantz and Léon Arthur Tutundjian.
Title: Mathieu Ficheroux
Passage: Matheus Josephus Lambertus (Mathieu) Ficheroux (April 22, 1926 - October 11, 2003) was a Dutch artist, who worked as sculptor, glass painter, painter, draftsman, wall painter and installation artist.  He is considered among the foremost Dutch artist of the second part of the 20th century.
Title: Theo van Doesburg
Passage: 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.
Theo van Doesburg Art Concret