See also Index | Events.
1796
01.01.1796Initial publication of the Conversations-Lexicon
1800
01.01.1800 – 31.12.1899Thirteen editions of Brockhaus published in 19th century
1808
01.02.1808Purchase of publishing rights by Brockhaus
1812
01.03.18122nd edition of Brockhaus published
1880
01.01.1880First publication of Duden Wörterbuch
1894
01.02.189414th edition of the Brockhaus Enzyklopädies published
1902
01.01.1902Duden confirmed as standard for spelling
1914
28.07.1914 – 11.11.1918World War I
1918
01.01.1918 – 01.01.1933Weimar Republic
1934
01.01.1934 – 31.12.193515th edition of the Brockhaus Enzyklopädie published
1951
01.01.1951First East-German Duden edition published
1955
01.01.1955Duden reconfirmed as standard for spelling
1966
01.01.1966Name “Brockhaus Enzyklopädie” established
1991
01.01.1991“Einheitsduden” published
1996
01.01.1996German spelling reform
2005
01.01.2005 – 31.12.200621st edition of the Brockhaus Enzyklopädie published
2011
02.05.2011Duden online launched
2014
01.11.2014Print version of Brockhaus discontinued
2015
01.01.2015Brockhaus Enzyklopädie published online
2018
09.11.2018Official launch of Compendium heroicum
2020
24.09.2020Online Compendium on German-Greek Entaglements (ComDeG) launched
01.10.2020Biographical online lexicon “Eiserner Vorhang” is published
2021
22.02.2021OES Demo encyclopedia, an exemplary OES application, launched
2022
24.02.2022Release OES 2.0
01.11.2022Germersheimer Übersetzerlexicon UeLEX relaunched
01.12.2022Compendium heroicum available in English
2023
26.01.2023Key Concept Online is launched
24.04.2023Release OES 2.2
05.12.2023DATA AFFAIRS (German) launched
2024
05.02.2024Release OES 2.3.0
06.03.2024“Online Encyclopaedia of the Nazi Genocide of the Sinti and Roma in Europe” launched
2025
09.05.2025DATA AFFAIRS (English) launched