From the record
“Grant National Historic Site is a 9.65-acre (3.91 ha) United States National Historic Site located 10 miles (16 km) southwest of downtown St. Louis, Missouri, within the municipality of Grantwood Village, Missouri.”
Wikipedia article Ulysses S. Grant National Historic Site, CC BY-SA 4.0.
One of 663 National Register listings published here for St. Louis County · listed in 1979 · category: Building · built in 1989.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service