Historian Sidney A. Marchand, who was also an attorney, was elected as mayor of the city and state legislator during that period. He served as a state Senator and contemporary of Governor Huey Long. During the mayoral administrations of Sidney A. Marchand and his son Sidney Marchand, Jr., they directed the construction of significant infrastructure in Donaldsonville (including about 12 miles of paving, and the still-extant sewerage system). Today the Donaldsonville Historic District has what is described as the "finest collection of buildings from the pre-Civil War to 1933 period" of river towns above New Orleans. It is listed on the National Register of Historic Places.