From the record
“Sunday House is located in Marshalltown, Iowa, United States. It was designed by Frank Lloyd Wright in the Usonian style, and was listed on the National Register of Historic Places in 1988.”
Wikipedia article Robert H. Sunday House, CC BY-SA 4.0.
One of 18 National Register listings published here for Marshall County · listed in 1988 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service





