View into a blue tinted glass wall plane, showing reflection; It was not, however, until 1929 that the ideas of the earlier experimental period were finally realized in one of the most important buildings of the Modern Movement, the German (or Barcelona) Pavilion (destroyed; reconstructed 1986), Montjuïc, Barcelona. It was a last-minute addition to the German section of the Exposición Internacional in Barcelona in 1929 for which Mies van der Rohe and Lilly Reich (with whom he collaborated on exhibition projects) had been given overall design responsibility by the government in 1928. Here Mies van der Rohe used the open (decellurized) plan as an architectural analogy of the social and political openness to which the new German republic aspir...