Markus Prachensky was born on the 21st of March 1932 as the son of William Nicolaus Prachensky in Innsbruck. He studied architecture and then additionally painting at the Academy of Fine Arts in Vienna. Together with Wolfgang Hollegha, Josef Mikl, and Arnulf Rainer he found the artist group "Galerie St. Stephan". It was presented in a comprehensive exhibition of the Vienna Secession in 1957. His early works were influenced by the art of Piet Mondrian and he therefore developed strict geometric compositions. Many years, he only used the color red for his expressive work. His works in which the colors are reduced, give a very specific signaling effect. Markus Prachensky is considered to be one of the most important representatives of the Austrian avant-garden. He received numerous awards for his artistic work at home and abroad, the most recent one was the Great Golden Medal of the Republic of Austria.
Markus Prachensky died on the 15th of July 2011 in Vienna.