German diarists

Victor Klemperer (9 October 1881 – 11 February 1960) was a German scholar who also became known as a diarist. His journals, published in Germany in 1995, detailed his life under the German Empire, the Weimar Republic, the Third Reich, and the German Democratic Republic.
The three volumes of his diaries have been published in English translations: I Shall Bear Witness, To the Bitter End, and The Lesser Evil. The first two cover the period of the Third Reich have since become standard sources and have been extensively quoted. His book Lingua Tertii Imperii, published in English as The Language of the Third Reich, studies how Nazi propaganda manipulated and influenced the German language.

Elisabeth von Heyking (10 December 1861 – 4 January 1925) was a German novelist, travel writer and diarist. She is known for her best-selling 1903 novel Briefe, die ihn nicht erreichten (Letters Which Never Reached Him) and her travel diaries, published posthumously in 1926.

Friedrich Christian Laukhard (7 June 1757 – 28 April 1822) was a German novelist, philosopher, historian and theologian.
From 1783 to 1794 he volunteered in the Prussian army as a musketeer. During the War of the first coalition his regiment (v. Thadden) campaigned in Valmy.
Laukhard's military diary is of great interest for historical research on the Prussian army and the French revolutionary wars.
Due to his licentious and extrovert lifestyle, "Magister Laukhard" soon became a notorious figure.

Karl Koller (22 February 1898 – 22 December 1951) was a German General der Flieger and the Chief of the General Staff of Nazi Germany's Luftwaffe during World War II.