From the record
“Lawrence County Courthouse is a historic courthouse located at Mount Vernon, Lawrence County, Missouri. It was built in 1900, and is a rectangular, 2 1/2-story, Romanesque Revival style limestone building.”
Wikipedia article Lawrence County Courthouse (Missouri), CC BY-SA 4.0.
One of 4 National Register listings published here for Lawrence County · listed in 1980 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service