 Modernism began to enter Swedish art with Axel Törneman and then the Men of 1909, which was a group of young male artists, mainly from the Artist League school.More abstract forms were represented by Hilma af Klint, Nils von Dardel and Gösta Adrian Nilsson.The mid-1920s and a couple of decades following were both characterized by surrealism, the Halmstad Group, and of expressionism, which includes Gothenburg Schools realists, Sven Erixson and Bror Hjorth and a rigorous formalist, abstract minimalism of artists such as Olle Bærtling.