The park has two main sites: the Birthplaces of 2nd U.S. President John Adams and 6th U.S. President John Quincy Adams, and Peacefield including the “Old House,” home to four generations of the Adams family, and the Stone Library which contains more than 14,000 historic volumes.The park is comprised of 13 acres, 11 buildings and a collection comprising approximately 100,000 objects including original furnishings, books, archival materials and archeology donated by the family in 1946. In 1870 the Stone Library with over 12,000 volumes, was built to house the family’s books and papers belonging to John Adams, John Quincy Adams, Charles Francis Adams, and Henry and Brooks Adams. Henry Adams wrote his famous nine volume history of the United States there. There are more than twelve languages represented and includes a range of subjects from astronomy, literature, horticulture, natural history and theatre, including many significant and unique books such as: John Adams’ copy of George Washington’s Farwell Address, the Bible inscribed with a note of gratitude from the Mendi people to John Quincy; and a Bible Concordance dating to 1521. The collection also includes, 17th Century Primitive American Paintings, American and European decorative arts, architectural elements, an associated archeological collection, 19th Century photographs, Print Collection, and an archives collection comprising of Resource Management Records (1946-present), Adams Family Papers (1745-1927), and the Adams Memorial Society Papers(1927-1946).