Philadelphia Architecture:  A Guide to the City, Second Edition. Prepared for Architecture, Philadelphia, Pennsylvania by the Group for Environmental Education, Inc. John Andrew Gallery, General Editor. Published by the Foundation for Architecture, 1994.

"The Keystone Bank was built in an era when self-made millionaires used architecture to express their success.  Willis Hale, according to his obituary, was fortunate "to have as clients a number of men whose desire to spend their easily ogtten millions was not controlled by eudcation or inherited standards of taste; and to this fact should be attributed some of the lack of restraint that marked his work."

    The bank is an example of Hale at his flamboyant best.  The design is derived from the French Renaissance revival, based on chateaux of the Loire Valley, which combined both classical detail and Gothic verticality.  Classical details include the pilasters, brackets and frieze; the tower, steep roof pitch, chimneys and decorations on the wall and dormer are clearly Gothic.  The elaborate facade is made of sharply outlined, rock-faced limestone.  The high mansard roof is even more elaborate, with dormers and chimneys creating an almost chaotic jumble of shapes" p. 74.