This historical survey of European encyclopedias and dictionaries brings together both encyclopaedias, such as the Britannica or the German Brockhaus, i.e. factual reference works, and dictionaries, such as Webster s or the German Duden, i.e. linguistic reference works, as outside specialist circles little distinction is made between information about things and information about words and their meanings.From the Vocabolario della Accademia de la Crusca from 1612, via the great French Encyclop die up to present-day works such as Wahrig, Duden and Wikipedia, the field of relevant works becomes increasingly tightly-knit. The individual reference works are described in historical portraits, and their particular lexicographical methodologies analysed.