Josef Hoffmann was an Austrian architect and designer of consumer goods. As his career progressed, Hoffmann's style became more sober and abstract, as well as increasingly limited to functional structures and domestic products. Hoffmann's Kubus and Koller collections are two of his enduring furniture designs, and have gone onto to be very popular into the 21st century. Hoffmann's ability to combine classic design principles to these Modern pieces have made these pieces true modern classics. Josef Hoffmann had a preference for geometric composition based on the square that was later attributed his own formal language called "Quadratstil." This language was evident in everything Josef Hoffmann created both architecturally as well as his innovative furniture designs, including the famed Kubus Chair.