The historical archive of the Library of Andritsaina contains an excellent collection of rare handwritten documents of the pre-revolutionary, revolutionary and post-revolutionary period. These include letters from supporters and fighters of 1821 (the families of Kolokotronis and Plapoutas, Anagnostis and Panagiotis Kanellopoulos, P. Anagnostopoulos, Mavrokordatos, etc.), Peloponnesian Senate Minutes, the manuscripts of lawmaker and Minister of Justice Nik. Dimitrakopoulos, as well as Har. Christopoulos, nephew of the founder of the Library Kon. Agathofronas Nikolopoulos, and Minister of Church and Education.