The Mies van Der Rohe building is part of the late production of the German architect but is the one that encloses all the essence of his research. A building where the architectural type of museum perfectly fits the type of the temple. The result is a quiet sacred place able to express itself beyond time. The most interesting thing, in fact, is that this is the Mies' building around which most things have happened. From the IBA building by James Stirling to the monumental Potsdammer Platz site all things have changed around it. But, if you visit now Berlin, you will find that the Neue Nationalgalerie site keeps his holyness alive. This book show a clean architectural and proportional graphic analysis of the museum through a huge number of sketches, 3d prospective and axonometric views and a complete reconstruction of the process that lead Mies to build this wonderful building.