This is something of a junior version of the Dekum Building. The
Haseltine is a Richardsonian Romanesque building with rough stone on the bottom and brick above. The massive arches are worthy of a Roman aqueduct; some of the stones weigh 3,000 pounds. Professor Leland Roth has noted that the lower arcade arches are exactly as tall as they are wide. Thus, if they continued on in their curve, they would make a perfect circle!
In the interest of safety, the Haseltine's original cornice was taken off, as there have been numerous instances of cornice pieces breaking off and falling to the pavement below in Portland. This may unbalance the building's look, but that's a small price to pay to avoid being hit in the head and getting a terra-cotta concussion.