The painterly abstraction of Sam Francis is most often associated with the American Abstract Expressionist movement, but Francis also spent a great deal of time in Paris and became linked with the parallel movement of Art Informel in Europe. (artsy.net)
Hans Hartung was an established German artist mostly known for his gestural abstract style and contributions to the European Art Informel movement. (widewalls.ch)
In Europe, a new art movement known as Art Informel emerged during the late 1940s. (visual-arts-cork.com)