From the record
“Pioneer Square is a neighborhood in the southwest corner of downtown Seattle, Washington, US. It was once the heart of the city: Seattle's founders settled there in 1852, following a brief six-month settlement at Alki Point on the far side of Elliott Bay.”
Wikipedia article Pioneer Square, Seattle, CC BY-SA 4.0.
One of 324 National Register listings published here for King County · listed in 1970 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article



