Otto Weininger has been accused of misogyny in his book Sex and Character, in which he characterizes the " woman " part of each individual as being essentially " nothing ," and having no real existence, having no effective consciousness or rationality.

* October 4 – Otto Weininger, Austrian-Jewish author ( b. 1880 )

Some of the University's better-known students include: Christian Doppler, Kurt Adler, Franz Alt, Bruno Bettelheim, Rudolf Bing, Lucian Blaga, Josef Breuer, F. F. Bruce, Elias Canetti, Ivan Cankar, Otto Maria Carpeaux, Felix Ehrenhaft, Mihai Eminescu, Paul Feyerabend, Heinz Fischer, O. W. Fischer, Ivan Franko, Sigmund Freud, Alcide De Gasperi, Ernst Gombrich, Kurt Gödel, Erich Göstl, Franz Grillparzer, Jörg Haider, Edmund Husserl, Hugo von Hofmannsthal, Marie Jahoda, Elfriede Jelinek, Percy Lavon Julian, Karl Kautsky, Elisabeth Kehrer, Hans Kelsen, Rudolf Kirchschläger, Arthur Koestler, Jernej Kopitar, Karl Kordesch, Karl Kraus, Bruno Kreisky, Richard Kuhn, Paul Lazarsfeld, Gustav Mahler, Tomáš Garrigue Masaryk, Lise Meitner, Gregor Mendel, Franz Mesmer, Franc Miklošič, Alois Mock, Matija Murko, Pope Pius III, Maxim Podoprigora, Hans Popper, Karl Popper, Otto Preminger, Wilhelm Reich, Peter Safar, Mordkhe Schaechter, Arthur Schnitzler, Albin Schram, Wolfgang Schüssel, Joseph Schumpeter, Theodor Herzl, John J. Shea, Jr., Adalbert Stifter, Yemima Tchernovitz-Avidar, Kurt Waldheim, Otto Weininger, Stefan Zweig, and Huldrych Zwingli.

* Otto Weininger

Otto Weininger was born on April 3, 1880 in Vienna as a son of the Jewish goldsmith Leopold Weininger and his wife Adelheid.

Otto Weininger was buried in the Matzleinsdorf Protestant Cemetery in Vienna.

* Weininger, Otto.

* Weininger, Otto.

* Weininger, Otto.

* Weininger, Otto.

Jews and Gender: Responses to Otto Weininger.

Otto Weininger: Sex, Science, and Self in Imperial Vienna University of Chicago Press, 2000 ISBN 0-226-74867-7

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Otto Eduard Leopold, Prince of Bismarck, Duke of Lauenburg ( 1 April 1815 – 30 July 1898 ), simply known as Otto von Bismarck, was a conservative German statesman who dominated European affairs from the 1860s to his dismissal in 1890.

* 1 April 1815 – 1865: Junker Otto von Bismarck

After seeing his opening with the death of Emperor Otto II, Boniface joined the league of Greeks and Saracens and headed for Rome in April 984.

Theophanu and Otto were married by Pope John XIII on April 14, 972 at Saint Peter's and she was crowned empress the same day in Rome.

* April 14 – Otto Dowling, United States Navy Captain, and the 25th Governor of American Samoa ( b. 1881 )

* April 27 – King Otto of Bavaria ( d. 1916 )

* April 19 – German art dealer Otto Wacker is sentenced to 19 months in prison for selling fraudulent paintings he attributed to Vincent van Gogh.

* April 1 – Otto von Bismarck, German statesman ( d. 1898 )

According to his own account, recorded in his autobiography Mein Leben, Wagner conceived Parsifal on Good Friday morning, April 1857, in the Asyl ( German: " Asylum "), the small cottage on Otto Wesendonck's estate in the Zürich suburb of Enge, which Wesendonck-a wealthy silk merchant and generous patron of the arts-had placed at Wagner ’ s disposal, through the good offices of his wife Mathilde Wesendonck.

Otto Ludwig Preminger ( 5 December 1905 – 23 April 1986 ) as reviewers scrambled to discern traces of Lubitsch's hand.

After his coronation, Otto III returned to Germany in December 996, staying along the Lower Rhine ( especially in Aachen ) until April 997.

In September 996, a few months after receiving a pardon from Otto III, Crescentius II meet with the Archbishop of Piacenza John Philagathos, a former adviser to the late Empress Theophanu, to devise a plan to depose the newly installed Pope Gregory V. In 997, with the active support of Byzantine Emperor Basil II, Crescentius II led a revolt against Gregory V, deposed him, and installed John Philagathos as Pope John XVI, an antipope, in April 997.

* March or April – Pope John XV dies before being able to crown Otto III, King of Germany as Holy Roman Emperor.

On April 14, 972, the sixteen-year old Otto II was married to the twelve-year old Eastern princess, and Thephanu was crowned empress by the Pope.

On April 14, 972, Otto II married Theophanu, a Byzantine princess of the Phokas family who was the cousin of reigning Byzatine Emperor John I Tzimiskes.

# Katharina ( 1256 – 4 April 1282, Landshut ), married 1279 in Vienna to Otto III, Duke of Bavaria who later ( after her death ) became the disputed King Bela V of Hungary and left no surviving issue.

* 21 July 1937 – April 1938: Dr. Otto Schmidt ( lord mayor ; NSDAP )

Otto Rank ( April 22, 1884 – October 31, 1939 ) was an Austrian psychoanalyst, writer, and teacher.

** Otto Sverdrup ( F312 ) Launched April 28, 2006.

The team first appears in Adventure Comics # 247 ( April 1958 ), and was created by Otto Binder and Al Plastino.

In Adventure Comics # 247 ( April 1958 ) by writer Otto Binder and artist Al Plastino, Superboy was met by three teenagers from the 30th century: Lightning Boy, Saturn Girl, and Cosmic Boy, who were members of a " super-hero club " called the Legion of Super-Heroes.

At the beginning of April, Otto Horsing, the Social Democratic Party of Germany Oberpräsident of Saxony, gave instructions to police and paramilitary forces to occupy the copper mines and chemistry plants around Halle, " to prevent sabotage and attacks on managers ".

Otto (; 27 April 1848 – 11 October 1916 ), was King of Bavaria from 1886 to 1913.

Prince Otto was born on 27 April 1848, two months premature, in the Munich Residenz.