The stone bearing the word "Library," directly over the main entrance of the Graduate Library, is surrounded by the 12 signs of the zodiac, symbolizing universality.

The zodiac signs are, from the top left clockwise: Capricorn, Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, and Sagittarius.

Both this piece and the north facade medallions were sculpted by Ulysses Ricci, who is known for his Boweryesque corbels.[16]