From the record
“The Clay County Courthouse in Clay Center, Kansas was built during 1900-01. It was listed on the National Register of Historic Places in 1973.”
Wikipedia article Clay County Courthouse (Kansas), CC BY-SA 4.0.
One of 4 National Register listings published here for Clay County · listed in 1973 · category: Building · built in 1901, Romanesque Revival architecture, by James C. Holland.
Sources: the Wikipedia article · the National Register database, National Park Service