The famous person Ernst Schowengerdt is associated with one of more of the Warren County historic places.
Some of the country's most noteable architects helped create the Warren County places including Knight, W.J. & Co., et al., Teach Callaway, William Brady, Conrad,Julius, & Co., John Mittler, Frederich W. Borgmann and Irving R. Timlin. Prominent architectural styles found in Warren Country are Classical Revival, Early Commercial and Federal.