Calvin Coolidge Presidential Foundation.

https://coolidgescholars.org/about/about-the-coolidge-foundation/

The Coolidge Foundation is the official foundation dedicated to preserving the legacy and promoting the values of America’s 30th president. The Foundation was formed in 1960 by John Coolidge, the president’s son, along with a group of fellow Coolidge enthusiasts. The Foundation is based at the president’s birthplace in Plymouth Notch, Vermont. It seeks to greatly increase Americans’ understanding of President Coolidge and the values he promoted.