Encyclopaedia, or Descriptive Dictionary of the Sciences, Arts and Trades - one of the most important works by French en-lightener, writer, philosopher and encyclopaedist Denis Diderot (1713-1784). It was published during 1751-1780 (in 7 vol., with 11 vol. of illustrations and 4 vol. of supplements), and was the crowning glory of the efforts of the French intellectual minds and printers of that time. The Vilnius University Library holds 5 editions of this encyclopedia.