This image by Charles Sheeler is Delmonico Building, 1926. This image appears to have been drawn in pencil. The most important elements of art in this artwork are points and lines. Numerous horizontal and vertical lines not only outline the shape and frame of the building but create tone through a hatching technique. There are various shades of gray throughout. The way and perspective in which the lines are drawn make the buildings appear to be three-dimensional. I believe the lines drawn also give the buildings the look of having a certain rough texture. The empty space in the top left corner attract your eye to the right half of the drawing.