Collections comprise both personal papers and professional records, relevant collections include: Anton Oberbeck (1846-1900), at Martin-Luther Universitt̃ (MLU), 1879-1885, theoretical physics; Ernst Dorn (1848-1916), at MLU 1886-1916, experimental physics; Karl Eduard Franz Schmidt (1862-1950), at MLU 1889-1927, theoretical and applied physics; Albert Wigand (1882-1932), at MLU 1912-1926, meteorology and geophysics; Gustav Adolf Feodor Mie (1868-1957), at MLU 1917-1924, electrophysics; August Julius Herweg (1879-1936), at MLU 1917-1923, spectroscopy and electrophysics, professional records only; Carl Hermann Knoblauch (1820-1895), at MLU 1853-1895, experimental physics; Gustav Ludwig Hertz (1887-1975), experimental physics, professional records only; Gerhard Hoffmann (1880-1945), at MLU 1928-1937, experimental physics; Adolf Smekal (1895-1959), at MLU 1928-1945, theoretical and technical physics; Heinz Pose (1905-), at MLU 1930-1945, nuclear physics; Wilhelm Kast (1898-1980), at MLU 1937-1945, experimental physics and liquid crystal physics; Wilhelm Arnold Otto Messerschmidt (1906-1975), at MLU 1945-1968, experimental physics; G nther Christian Mn̲ch (1902-), at MLU 1945-1967, applied physics; Erich Kretzschmann (1887-1973), at MLU 1946-1951, theoretical physics.