As part of their campaign to unify the German people behind Nazi ideals, Hitler enouraged his architects, especially Albert Speer, to create places for Germans to have what he termed "mass experiences." To do this, they created assembly halls, stadia, and assembly grounds where thousands could gather to display their patriotism and be edified by the speeches of party leaders. The most significant of these places was the Zeppelin Field at Nuremburg, where the Nazi Party held annual rallies celebrating the anniversaries of its formation in 1920 and the 1923 Beer Hall Putsch. The Zeppelintribune was the centerpiece of the Nuremburg party monuments. It incorporated classical elements, but modified them to emphasize line, cleanliness, and order. From this building, Hitler and other party leaders gave speeches to assemblies of tens of thousands of germans. The most effective part of this assembly grounds was not the building, but the light. Speer surrounded the assembly area with hundreds of spotlights pointed skywards. The effect was to create a "cathedral of light," a Lichtdom, and its impact was tremendous.