From the record
“The Roxy Theatre in Langdon, North Dakota, United States, in the center of the Langdon business district, was built in 1936 in Early Commercial architecture. It was listed on the National Register of Historic Places in 1998.”
Wikipedia article Roxy Theatre (Langdon, North Dakota), CC BY-SA 4.0.
One of 3 National Register listings published here for Cavalier County · listed in 1998 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article