Allgemeine Enzyklopädie der Wissenschaften und Künste, (German: “Universal Encyclopaedia of Sciences and Arts”), monumental uncompleted German encyclopaedia of which 167 volumes were published from 1818 to 1889. Founded by a German bibliographer, Johann Samuel Ersch, who began work on it in 1813, the Allgemeine Enzyklopädie der Wissenschaften und Künste is noteworthy for containing the longest known encyclopaedia article—the article about Greece, covering 3,668 pages in volumes 80–87. The signed articles of the work were written by leading German scholars of the 19th century.

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