Andreas Streun was born in 1960 as the son of a forest ranger and a teacher. His interest soon turned to painting and the natural sciences. In 1978 he began to study art and physics in parallel, but opted for physics because the laws of nature seemed more reliable to him than the changing trends of the art business, and initially trained as a painter autodidactically.

It was not until 2007 that he learned the old-master technique of combining egg tempera and oil glazes from Philip Rubinov-Jacobson in Reichenau /Rax and received inspiration from De Es Schwertberger and Ernst Fuchs in Vienna. He studied nude and portrait drawing with Dietmar Gross in Oppenheim and was his student in 2010-11.

As an artist, he could be free, because the income came from physics: after studying and obtaining his doctorate, he worked as an accelerator physicist at the Paul Scherrer Institute in Villigen from 1992-2022 and lectured at the ETH and the University of Zurich.

He has been married to Brigitte Rosenthal since 2001. The couple lives in the 300-year-old former school house of Niedereggenen and runs studios there for felt and textiles (BR) and for painting (AS).