Its symbol was the swastika, at the time a commonly seen symbol in the world that had experienced a revival in use in the western world in the early 20th century. German völkisch Nationalists claimed the swastika was a symbol of the Aryan race, who they claimed were the foundation of Germanic civilization and were superior to all other races. As the Italian Fascists adapted elements of their ethnic heritage to fuel a sense of Nationalism by use of symbolism, so did Nazi Germany. Turn-of-the-century German-Austrian mystic and author Guido von List was a big influence on Reichsführer-SS Heinrich Himmler, who introduced various ancient Germanic symbols (filtered through von List's writings) more thoroughly into the SS, including the stylized double Sig Rune (von List's then-contemporary Armanen rune version of the ancient sowilo rune) for the organization itself. The black-white-red tricolor of the German Empire was utilized as the color scheme of the Nazi flag. The color brown was the identifying color of Nazism (and fascism in general), due to its being the color of the SA paramilitaries (also known as Brownshirts). Other historical symbols that were already in use by the German Army to varying degrees prior to the Nazi Germany, such as the Wolfsangel and Totenkopf, were also used in a new, more industrialized manner on uniforms and insignia. Although the swastika was a popular symbol in art prior to the regimental use by Nazi Germany and has a long heritage in many other cultures throughout history - and although many of the symbols used by the Nazis were ancient or commonly used prior to the advent of Nazi Germany - because of association with Nazi use, the swastika is often considered synonymous with Nazism and some of the other symbols still carry a negative post-World War II stigma in Western countries, to the point where some of the symbols are banned from display altogether. Spain The fascist Falange in Spain utilized the yoke and arrows as their symbol. It historically served as the symbol of the shield of the monarchy of Ferdinand and Isabella and subsequent Catholic monarchs, representing a united Spain and the "symbol of the heroic virtues of the race". The original uniform of the Falangistas was the blue shirt – derived from the blue overalls of industrial workers – which was later combined with the red beret of the Carlists to represent their merger by