| | Texts | Author | Date |
|---|
| | August Bebel (by Lenin) | Lenin | 1913 |
| | Baptism Certificate of Friedrich Engels | Friedrich Engels | 1821 |
| | Certificate of Conduct for the One-Year Volunteer Friedrich Engels | Friedrich Engels | 1842 |
| | Comments on Engels' The Peasant War in Germany | David Riazanov | 1925 |
| | Conspectus of the Book The Holy Family by Marx and Engels | Lenin | 1895 |
| | Engels’ Edition of the Third Volume of Capital and Marx’s Original Manuscript | Michael Heinrich | 1996 |
| | Engels’ Letters to Kautsky | Leon Trotsky | 1935 |
| | Engels’s War Articles | Leon Trotsky | 1924 |
| | Frederick Engels (by Lenin) | Lenin | 1895 |
| | Frederick Engels : His Life, His Work and His Writings | Karl Kautsky | 1899 |
| | Friedrich Engels Senior to His Wife Elise, August 27, 1835 | Friedrich Engels | 1835 |
| | Friedrich Engels Senior to Karl Snethlage, December 1, 1820 | Friedrich Engels | 1820 |
| | Friedrich Engels Senior to Karl Snethlage, October 5, 1842 | Friedrich Engels | 1842 |
| | From Hermann Lopatin's Letter to Maria Oshanina | German Lopatin | 1883 |
| | How History Is Written. Dished Up to Order by Stalin’s Savants on Frederick Engels Anniversary | Leon Trotsky | 1935 |
| | Legal Proceedings against the Neue Rheinische Zeitung (5) | Karl Marx | 1848 |
| | Letter to Ferdinand Lassalle, February 25, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, April 11, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, April 12, 1855 | Karl Marx | 1855 |
| | Letter to Friedrich Engels, April 14, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, April 15, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, April 16, 1856 | Karl Marx | 1856 |
| | Letter to Friedrich Engels, April 18, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, April 2, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, April 2, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, April 2, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, April 22, 1854 | Karl Marx | 1854 |
| | Letter to Friedrich Engels, April 22, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, April 23, 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, April 23, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, April 24, 1848 | Karl Marx | 1848 |
| | Letter to Friedrich Engels, April 27, 1853 | Jenny von Westphalen | 1853 |
| | Letter to Friedrich Engels, April 30, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, April 6, 1855 | Karl Marx | 1855 |
| | Letter to Friedrich Engels, April 6, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, April 9, 1858 | Jenny von Westphalen | 1858 |
| | Letter to Friedrich Engels, April 9, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, August 1, 1877 | Karl Marx | 1877 |
| | Letter to Friedrich Engels, August 10, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, August 13, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, August 14, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, August 14, 1857 | Jenny von Westphalen | 1857 |
| | Letter to Friedrich Engels, August 14, 1860 | Jenny von Westphalen | 1860 |
| | Letter to Friedrich Engels, August 14, 1879 | Karl Marx | 1879 |
| | Letter to Friedrich Engels, August 15, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, August 15, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, August 16, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, August 17, 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, August 17, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, August 18, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, August 19, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, August 2, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, August 20, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, August 22, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, August 23, 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, August 24, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, August 26, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, August 4, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, August 5, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, August 7, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, August 7, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, August 8, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, August 8, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, August 9, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, Before April 15, 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, Between January 13 and 15 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, December 10, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, December 10, 1864 | Karl Marx | 1864 |
| | Letter to Friedrich Engels, December 10, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, December 13, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, December 14, 1853 | Karl Marx | 1853 |
| | Letter to Friedrich Engels, December 14, 1855 | Karl Marx | 1855 |
| | Letter to Friedrich Engels, December 14, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, December 14, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, December 15, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, December 17, 1851 | Jenny von Westphalen | 1851 |
| | Letter to Friedrich Engels, December 17, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, December 17, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, December 18, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, December 19, 1850 | Jenny von Westphalen | 1850 |
| | Letter to Friedrich Engels, December 19, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, December 19, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, December 2, 1856 | Karl Marx | 1856 |
| | Letter to Friedrich Engels, December 2, 1864 | Karl Marx | 1864 |
| | Letter to Friedrich Engels, December 22, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, December 23 or 24, 1859 | Jenny von Westphalen | 1859 |
| | Letter to Friedrich Engels, December 24, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, December 24, 1866 | Jenny von Westphalen | 1866 |
| | Letter to Friedrich Engels, December 25, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, December 26, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, December 27, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, December 4, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, December 5, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, December 7, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, December 8, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, December 9, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, End of July 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, February 1, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, February 1, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 10, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, February 10, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 10, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, February 11, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, February 11, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 12, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, February 13, 1855 | Karl Marx | 1855 |
| | Letter to Friedrich Engels, February 13, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, February 13, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 14, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, February 17, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, February 18, 1852 | Karl Marx | 1852 |
| | Letter to Friedrich Engels, February 18, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 19, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, February 2, 1855 | Karl Marx | 1855 |
| | Letter to Friedrich Engels, February 2, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, February 20, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, February 22, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, February 23, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, February 23, 1853 | Karl Marx | 1853 |
| | Letter to Friedrich Engels, February 24, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, February 25, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, February 25, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 25, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, February 27, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, February 3, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, February 3, 1860 | Karl Marx | 1860 |
| | Letter to Friedrich Engels, February 3, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, February 8, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, February 9, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, February 9, 1860 | Karl Marx | 1860 |
| | Letter to Friedrich Engels, January 11, 1851 | Jenny von Westphalen | 1851 |
| | Letter to Friedrich Engels, January 11, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, January 11, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, January 13, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, January 15, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, January 16, 1852 | Jenny von Westphalen | 1852 |
| | Letter to Friedrich Engels, January 16, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, January 19, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, January 2, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, January 20, 1864 | Karl Marx | 1864 |
| | Letter to Friedrich Engels, January 24, 1852 | Karl Marx | 1852 |
| | Letter to Friedrich Engels, January 24, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, January 25, 1854 | Karl Marx | 1854 |
| | Letter to Friedrich Engels, January 25, 1860 | Karl Marx | 1860 |
| | Letter to Friedrich Engels, January 25, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, January 28, 1860 | Karl Marx | 1860 |
| | Letter to Friedrich Engels, January 28, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, January 30, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, January 5, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, January 5, 1882 | Karl Marx | 1882 |
| | Letter to Friedrich Engels, January 7, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, January 7, 1852 | Jenny von Westphalen | 1852 |
| | Letter to Friedrich Engels, January 8, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, January 8, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, July 1, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, July 12, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, July 13, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, July 14, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, July 14, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, July 15, 1858 | Karl Marx | 1858 |
| | Letter to Friedrich Engels, July 17, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, July 18, 1877 | Karl Marx | 1877 |
| | Letter to Friedrich Engels, July 20, 1852 | Karl Marx | 1852 |
| | Letter to Friedrich Engels, July 20, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, July 20, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, July 22, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, July 25, 1877 | Karl Marx | 1877 |
| | Letter to Friedrich Engels, July 27, 1854 | Karl Marx | 1854 |
| | Letter to Friedrich Engels, July 27, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, July 28, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, July 29, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, July 3, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, July 31, 1857 | Jenny von Westphalen | 1857 |
| | Letter to Friedrich Engels, July 31, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, July 5, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, July 5, 1870 | Karl Marx | 1870 |
| | Letter to Friedrich Engels, July 6, 1857 | Karl Marx | 1857 |
| | Letter to Friedrich Engels, July 6, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, July 7, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, July 7, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, June 10, 1859 | Karl Marx | 1859 |
| | Letter to Friedrich Engels, June 10, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, June 12, 1863 | Karl Marx | 1863 |
| | Letter to Friedrich Engels, June 14, 1853 | Karl Marx | 1853 |
| | Letter to Friedrich Engels, June 16, 1851 | Karl Marx | 1851 |
| | Letter to Friedrich Engels, June 18, 1862 | Karl Marx | 1862 |
| | Letter to Friedrich Engels, June 19, 1861 | Karl Marx | 1861 |
| | Letter to Friedrich Engels, June 2, 1853 | Karl Marx | 1853 |
| | Letter to Friedrich Engels, June 20, 1866 | Karl Marx | 1866 |
| | Letter to Friedrich Engels, June 20, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, June 21, 1854 | Karl Marx | 1854 |
| | Letter to Friedrich Engels, June 22, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, June 23, 1868 | Karl Marx | 1868 |
| | Letter to Friedrich Engels, June 24, 1865 | Karl Marx | 1865 |
| | Letter to Friedrich Engels, June 26, 1869 | Karl Marx | 1869 |
| | Letter to Friedrich Engels, June 27, 1867 | Karl Marx | 1867 |
| | Letter to Friedrich Engels, June 3, 1864 | Karl Marx | 1864 |
| | Letter to Friedrich Engels, June 7, 1849 | Karl Marx | 1849 |
| | Letter to Friedrich Engels, June 7, 1864 | Karl Marx | 1864 |
| | Letter to Friedrich Engels, June 7, 1866 | Karl Marx | 1866 |
