The Codex diplomaticus cavensis (CDC bibliographic abbreviation; in Italian: the diplomatic code of the Cavense, or Cavese) is an editorial project active in the field of the history of medieval Italy and Langobardia Minor, which began in 1873 and continued with an irregular trend.

The project pursues the objective of exhaustive publication of the entire diplomatic and documentary corpus kept in the archive of the Benedictine Abbey of the Holy Trinity, located in Cava de 'Tirreni.

The edition of the eight nineteenth century tomes is due to three monks of the abbey, Michele Morcaldi, the main author, Mauro Schiani and Silvano De Stefano.

The resumption of publications took place about a century later, in the years from 1984 to 1990, in which two new volumes, the ninth and the tenth, were completed, edited by Giovanni Vitolo, a medievalist of the University of Naples Federico II, and by archivist Simeone Leone.

The second series is edited by Giovanni Vitolo and Simeone Leone and includes the two added volumes published in 1984 and 1990.