English: Looking west at 1701 Pennsylvania Avenue NW in Washington, D.C., in the United States. This 12-story, Modernist building was the first major commission for architect Vlastimil Koubek in the city. Koubek originally proposed a 13-story structure with a facade of gold-anodized aluminum and white marble. But the United States Commission of Fine Arts strongly objected to this. Koubek's final, approved design utilized larger, octagonal window designs of marble with recessed ribs of bronze aluminum. It was highly praised as pushing D.C. architectural design "forward 10 years."