The E. A. Arnim Archives & Museum is dedicated to preserving the history of the Flatonia area, including its people and its culture.
The museum's exhibits illustrate the settlement, early history and continuing development of Flatonia and the currounding communities. The ground floor of the main building is a showcase of goods and furnishings from early Flatonia homes, businesses, clubs, schools and churches, while the second floor houses the Flatonia area Veterans Museum. A separate barn contains a country life collection with everything from a complete farm kitchen to a wide array of vehicles and farm implements spanning decades of local agricultural use. Displays of historic photographs, letters, documents, and local advertising memorabilia throughout the exhibits add an extra layer of detail to the story of Flatonia.
