The Main Library, also known as the Erie Public Library, combines elements of the Beaux Arts Classicism and Second Renaissance Revival styles of architecture. Both were commonly used at the end of the nineteenth century to convey the importance of public buildings. The building features arched openings, a prominent cornice, swag and garland decorations, and a roofline balustrade. It is clad in Pompeian red brick. The original facade is dominated by a marble portico, which was removed and stored by previous owners. It was reassembled and conserved as part of the renovation, recapturing the library's original grandeur.