A materially dense, visually rich surface of terra cotta relief sculpture at the second and fourth registers of the building includes medallion portraits of three influential nineteenth century natural scientists. Louis Agassiz, Samuel F.B.Morse, and Joseph Henry are depicted at the second register, and an allegorical portrait of the Goddess of Wisdom completes the arched decoration at the fourth register. Seen in its entirety, the main entrance to Williams is a diverse composition of arches, posts, and capitals which change through the seasons and the time of day; a building facade that one never tires of viewing.