Includes awards, biographical files, lecture and classroom manuscripts, notes, letters, speeches in six series: 1. Correspondence (incoming and outgoing), some 2000 letters among correspondents many physicists and mathematicians related to physics; 2. Professional/Vocationl Matters and Various Awards (activities as director of Mathematisches Seminar der Universitt̃ Gt̲tingen, 1907-1928; papers of students, among them a number on physical topics (capillarity, electricity, kinetic gas theory, mechanics, optics); 3. Mathematical Seminars Gt̲tingen (50 folders), including Hilbert's lectures, 1886-1924, among them: Hydrodynamik (1887); Mechanik (1898); Logische Principien des Mathematischen Denkens (1905)--with Max Born's assistance; Grundlagen der Mathematik und Physik (1913); Elektronentheorie (1917-1918); Rum und Zeit (1918-1919); Hoehere Mechanik und neue Gravitationstheorie (1920); Anschauliche Geometrie (1920-1921); Grundgedanken der Relativitt̤stheorie (1921); Statistische Methoden, insbesondere der Physik (1922)--with Lothar Nordheim; Mathematische Grundlagen der Quantentheorie (1922-1923)--with Lothar Nordheim; Unsere Vorstellungen von Gravitation und Elektrizitt̤ (1923-1924); Mechanik (1924). Also talks on Niels Bohr (1922), H. A. Lorentz (1910), M. Planck (1917), H. Poincar ̌(1909, 1912); 4. Mathematical Manuscripts (100 folders), among them: Ueber die Gesetze des Zufalls (1920); Elektronentheorie; Gravitation; Quantentheorie; Statistische Mechanik; Elektrodynamik; Physik des Aethers; Physikalische Literatur; Physik und Astronomie; also Hilbert's own student papers and notes on seminars; calculations and notes relating to mathematical problems, philosophy, etc.; handwritten Hilbert material); 5. Manuscripts from colleagues (60 folders), mainly seminar notes; 6. Biographical Information (50 folders) including correspondence with learned societies, autobiography, bibliography, photos of mathematicians, family. Correspondents: Richard B r, Harry Bateman, Arnold Berliner, Otto Blumenthal, Ludwig Bieberbach, Ludwig Boltzmann, Max Born, L. E. J. Brower, Georg Cantor, Constantin Caratheodory, Richard Courant, Paul Ehrenfest, Felix Ehrenhaft, Albert Einstein, Peter Ewald, Paul Hertz, Adolf Hurwitx, Theodor von Karman, Fexlix Klein, Max von Laue, Philipp Lenard, Hendrik A. Lorentz, A. E. H. Love, Erich Marx, Gustav Mie, Hermann Minkowski, Walther Nernst, Lothar Nordheim, F. Pashchen, J. Petzoldt, Henri Poincar,̌ Ludwig Prandtl, Ernst Reichenb cher, P. Scherrer, Karl Schwarzschild, H. v. Seeliger, M. von Smoluchovski, Arnold Sommerfeld, Paul G. Stc̃kel, V. A. Steklov, Hermann Struve, G. Tammann, Woldemar Voigt, Paul Volkmann, V. Volterra, A. Vasiliev, Heinrich Weber, H. Weyl, W. Wien, Max Wien, Ernst Zermalo. Also Hilbert's letters of reference on P. Debye, G. Herglotz, H. Minkowski, E. Noether, M. Wien, E. Zermelo.