usage of the properties in Sycamore Historic District is similar to that in other small, Illinois county seats the district's properties are separated by their survival through the 20th century. The buildings themselves are most significant for their architecture which contributes to what the National Register of Historic Places nomination form in 1978 said conveyed "a gracious calm very close to the popular American image of an ideal small town." Notes Historic districts on the National Register of Historic Places in Illinois Sycamore, Illinois National Register of Historic Places in DeKalb County, Illinois