The famous person Rose Philippine Duchesne is associated with one of more of the St. Charles County historic places.
Some of the country's most noteable architects helped create the St. Charles County places including Louis Wessbecher, Platte.John Joseph, H.C. Bode, Albert B. Groves, William D. Parsons, Frank & Adolph Haverkamp and Henry Kister. Prominent architectural styles found in St. Charles Country are Greek Revival, Late 19th And 20th Century Revivals and Late Victorian.