Considered one of Sullivan's most famous buildings, the Guaranty Building
retains many of its original decorative elements designed by the architect. The
drawing shows the general outline of the doorknob that was used throughout the
building. Yale & Towne, a manufacturer of cast-iron architectural
elements, produced the doorknob.
The drawing was part of a group that Sullivan gave to Frank Lloyd Wright,
who had worked for him as a young architect. The drawings were purchased for
Avery after Wright's death by Edgar Kaufmann, Jr., whose family had commissioned
Wright's Fallingwater. The doorknob was an extra found at the building and
donated to the library.