From the record
“Roberts County Courthouse in Sisseton, South Dakota was built in 1902. It was listed on the National Register of Historic Places in 1976.”
Wikipedia article Roberts County Courthouse (South Dakota), CC BY-SA 4.0.
One of 12 National Register listings published here for Roberts County · listed in 1976 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

