Kralj went to Vienna in 1913 to study sculpture. In 1915 he stopped his studies because of the war. In 1919 he returned from the war and went to study in Prague for two years. From 1920-1923, Kralj was in the center of the Slovenian expressionism movement. Expressionism explores philosophical themes. Kralj left the expressionism movement and was soon in the center of the Slovenian "new reality" movement. The "new reality" style uses designs of everyday life.