The history of Dutch trade unions may not seem especially scintillating, but its famed architect, H. P. Berlage, considered the building his most successful work. Built in 1900 for the country's first modern labor collective, the Diamond Workers Union, Berlage could incorporate his strong socialist principles into the essential structure. Climb the tower for a view of the neighborhood and enjoy a small display of Berlage's fine architectural blueprints while you're up there. In the various meeting rooms, note the fantastic murals by Richard Roland Holst, stained glass depicting the workers' battle, and the decorative details that fuse Jugendstil with Arts and Crafts stylings on ceilings, doors, and walls. The excellent collection of posters shows the graphic influence of the Soviet avant-garde on designs of the time.
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