Seagram Building, New York City process

Process of a drawing of the Seagram Building in New York City from a commission earlier this year from a local architect/developer. 

The integral plaza, building, stone faced lobby and distinctive glass and bronze exterior were designed by German-American architect Ludwig Mies van der Rohe and completed in 1958 at 38 stories and it is one of the most notable examples of the functionalist aesthetic and a noted example of corporate modern architecture. 
Finished drawing size is 11”w x 17”h.