German encyclopaedia published in Wiesbaden, Ger., and generally regarded as the model for the development of many encyclopaedias in other languages. Its entries are considered exemplars of the short, information-filled article.

The first edition was published (1796–1808) as Konversationslexikon by Friedrich Arnold Brockhaus (Brockhaus, Friedrich Arnold), who advocated inclusion of the latest material, the simplification of complicated treatments, and the use of highly specific entries. His philosophy was to make easily accessible to schoolchildren and to the lay reader readily learned information on all kinds of subjects. Brockhaus has maintained an emphasis on popular knowledge and information and an insistence on high-quality illustrations, used lavishly throughout.

Brockhaus' name did not appear in the encyclopaedia's title until the publication of the 15th edition as Der grosse Brockhaus (20 volumes and supplement, 1928–35). The 16th edition (1952–63), with 12 volumes, 2 supplementary volumes, and an atlas, reinforced the work's status as a reliable reference set covering an extremely wide range of topics with short articles. A completely revised and reset 17th edition, Brockhaus Enzyklopädie (1966–81), had 20 volumes, an atlas, 3 supplementary volumes, and a dictionary. The 18th edition, with 12 volumes, an atlas, a dictionary, and 1 supplementary volume, was published between 1977 and 1982. A revised and reset 19th edition began to be published in 1986.