From the record
“The Onawa IOOF Opera House, also known as the Onawa Opera House, is a historic opera house located in Onawa, Iowa. It was completed in November, 1900, only to be heavily damaged in a fire a month later, on December 24, 1900.”
Wikipedia article Onawa IOOF Opera House, CC BY-SA 4.0.
One of 11 National Register listings published here for Monona County · listed in 1990 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service