The archival collection includes manuscripts:
Zygmunt Krasinski (1812-1859), Cyprian Kamil Norwid (1821-1883), Artur Grottger (1837-1867), Antoni Edward Odyniec (1804-1885), Jadwiga Łuszczewska (1834-1908), Józef Ignacy Kraszewski (1812-1887), Józef Kotarbiński (1849-1928), Antoni Pietkiewicz (1823-1903), Stanisław Wyspiański (1869-1907), Władysław Stanisław Reymont (1869 - 1907), Henryk Sienkiewicz (1846-1916), Zofia Kossak (1889-1968), Stanisław Baliński (1898-1984), Eliza Orzeszkowa (1841-1910), Maria Konopnicka (1842-1910), Teofil Lenartowicz (1822-1893), Bishop Adam Naruszewicz (1733-1796), Franciszek Zablocki (1752 - 1821), Stanisław Trembecki (1739-1812), Julian Ursyn Niemcewicz (1758-1841), Tadeusz Czacki (1765-1813), Joachim Lelewel (1786-1861), Klementyna Hoffmanowa (1798-1845), Józef Korzeniowski (1797-1863), Franciszek Morawski (1783-1861), Józef Bohdan Zaleski (1802-1886), Maryla Wereszczakówna (1799-1863), Józef Maria Hoëné-Wroński (1776-1853), Henryk Rzewuski (1791-1866), Kornel Ujejski (1823-1897), Władysław Syrokomla (1823-1862), Aleksander Jełowiecki (1804-1877), Teodor Tomasz Jeż (1824-1915), Józef Jankowski (1865-1939), August Cieszkowski (1814-1894), Kazimierz Przerwy-Tetmajer (1865-1940), Antoni Golubiew (1907-1979), Wiktor Gomulicki (1848-1919), Wladyslaw Jan Grabski (1901-1970), Kazimiera Illakowiczówna (1892-1983), Jan Kasprowicz (1860-1925), Jan Karlowicz (1836-1903), Jan Lechon (1899-1956), Jerzy Liebert (1904-1931), Kornel Makuszynski (1884-1953), Artur Oppman (1867-1931), Ferdinand Ossendowski (1878-1945), Maria Rodziewiczówna (1864-1944), Leopold Staff (1878-1957), Aleksander Świętochowski (1849-1938), Emil Zegadłowicz (1888-1941), Bolesław Prus, Lucjan Rydel (1870-1918), Wladyslaw Maleszewski (1832-1913), Karol Hubert Rostworowski (1877-1938), Szymon Askenase (1865-1935), Wladyslaw Mickiewicz (1838-1926), Stanislaw Tarnowski (1837-1917), Stanislaw Wojciechowski (1869-1953), Aleksander Brückner (1856-1939).
 
Also noteworthy is the collection of papal bulls - from the pontificate of Julius II (1503-1513), through Paul III (1534-1549), Julius III (1550-1555), Pius V (1566-1572), Gregory XIII (1572-1585), Paul V (1605-1621), Urban VIII (1623-1644), and Pius VII (1800-1823).
 
The collection also includes royal letters: Ladislaus III Jagiello (1424-1444), Sigismund I the Old (1467-1548), Sigismund II Augustus (1520-1572), Henry III Valois (1551-1589), Stefan Batory (1533-1586), Anne Jagiellon (1523-1596), Sigismund III Vasa (1566-1632), Ladislaus IV Vasa (1595-1648), John II Casimir (1609-1672), Michal Korybut Wisniowiecki (1640-1673), John III Sobieski (1629-1696), Maria Kazimiera (1641-1716), Augustus II the Strong (1670-1733), Augustus III (1696-1763), Stanislaw Leszczynski (1677-1766), Stanislaw August Poniatowski (1732-1798).
 
Among the documents are also writings related to important historical figures, such as: Stanisław Żółkiewski (1547-1620), Lew Sapieha (1557-1633), Jan Karol Chodkiewicz (1560-1621), Stanisław Koniecpolski (ca. 1594-1646), Jakub Sobieski (1590-1646), Stanisław "Rewera" Potocki (ca. 1589-1667), Łukasz Opaliński (1581-1654), Stefan Czarniecki (1599-1665), Aleksander Józef Sulkowski (1695-1762), Michał Kazimierz "Rybeńko" Radziwiłł (1702-1762), Wacław Rzewuski (1706-1779), Kazimierz Pułaski (1746-1779), Adam Poninski (1732-1798), Adam Kazimierz Czartoryski (1734-1823), Józef Poniatowski (1763-1813), Hugon Kołłątaj (1750-1812), Tadeusz Kościuszko (1746-1817), Jan Henryk Dąbrowski (1755-1818), Józef Neyman (ca. 1764-1835), Otto Karol Kniaziewicz (1762-1842), Frederick Augustus I (King of Saxony; 1750-1827), Michał Sokolnicki (1760-1816), Józef Longin Sowiński (1777-1831), Stanisław Staszic (1755-1826), Stanisław Kostka Zamoyski (1775-1856), Jan Stefan Krukowiecki (1772-1850), Józef Dwernicki (1779-1857), Daniel O'Connell (1775-1847), Józef Bem (1794-1850), Jan Zygmunt Skrzynecki (1786-1860), Napoleon III (Emperor of the French; 1808-1873), Francis Joseph I (1830-1916), Ambrose Grabowski (1782-1868), Albert Mun (1841-1914), Jean Yanoski (1813-1851), Elizabeth Alexeievny (1779-1826).
 
The collection also includes the writings and letters of saints, blesseds and Church dignitaries, including St. Clement Maria Hofbauer (1751-1820), St. Charles Borromeo (1538-1584), Stanislaus Hosius (1504-1579), Claudio Acquaviva SJ (1543-1615), Augustine Kordecki (1603-1673), Alexander VII (1597-1667), Stanislaus Konarski (1700-1773), Benedict XIV (1675-1758), Msgr. Ignatius Jacob Massalski (1726-1794), Henri Perreyve (1831-1865).
 
Large collection of source documentation of the January Uprising and among them documents related to Romuald Traugutt (1826 -1864), Marian Dubiecki (1838-1926), Ludwik Niemojowski (1823-1892), Ludwik Mieroslawski (1814-1878), Jozef Okoniewski (1838-1921), Marian Langiewicz (1827-1887). Władysław Kulczycki (1834-1895) Edward Maliszewski's (1875-1928) portfolios, pamphlet prints from the time of the November and January Uprisings.
 
Collection of memorabilia related to Gen. Joseph Haller (1873-1960)