Places in United States that have Cork Flooring in place for a very long time:
US Library of Congress , Washington DC
US Dept of the Interior, Washington DC (Patents office?)
https://www.doi.gov/library/about/art-and-architecture
Fallingwater (Home designed in 1935 by renown American Architect – Frank Lloyd Wright), Pennsylvania
https://www.fallingwater.org/visit/
First Congressional Church in Chicago (1890)
Mayo Clinic and Plummer Building (1912)
US National Archives (1930)
Lafayette College in Easton, (Pennsylvania) (1930’s)