The Upper West Side is filled with intricate and ornate apartment buildings. The northward expansion in the time of the new IRT lines to northern Manhattan, as well as the rise of the apartment as the preferred living space for the upper middle class around the turn of the 20th century, led to multiple speculative projects; the blocks of Broadway in the 70s is one of these prime locations. And the Dorilton is on the most remarkable buildings to come out of that time period.