From the 1950's onwards, Josef Alber's spent most of his time on the series of artwork that is now known collectively as 'Homage to the Squares'. Many of his paintings might have looked similar in terms of the shape and structure, but Alber wanted to focus on the color relationships within a similar format of squares. However, few people know that his first great works were works of art in glass. They fall under a category called glass assemblage. He starting making these around the 1920s and stopped in the early 1930s. Still, even his early works and later works are similar in that they both explore the contrasting effect of colors. The work below is called “Untitled”. It is a glass assemblage composed of metal wires, broken glass and bottles from the city dump in Weimar.