The national historical park's eleven buildings tell the story of five generations of the Adams family (from 1720 to 1927) including Presidents, First Ladies, envoys, historians, writers, and family members who supported and contributed to their success. In addition to Peacefield, home to four generations of the Adams family, the park's main historic features include the John Adams Birthplace (October 30, 1735), the nearby John Quincy Adams Birthplace (July 11, 1767), and the Stone Library (built in 1870 to house the books of John Quincy Adams and believed to be the first presidential library), containing more than 14,000 historic volumes in 12 languages.