The Dēnkard or Dēnkart (Middle Persian: 𐭣𐭩𐭭𐭪𐭠𐭫𐭲 "Acts of Religion") is a 10th-century compendium of Zoroastrian beliefs and customs during the time. The Denkard is to a great extent considered an "Encyclopedia of Mazdaism" and is a valuable source of information on the religion especially during its Middle Persian iteration. The Denkard is not considered a sacred text by a majority of Zoroastrians, but is still considered worthy of study. Name The name traditionally given to the compendium reflects a phrase from the colophons, which speaks of the kart/kard, from Avestan karda meaning "acts" (also in the sense of "chapters"), and dēn, from Avestan daena, literally "insight" or "revelation," but more commonly translated as "religion." Accordingly, dēn-kart means "religious acts" or "acts of religion." The ambiguity of -kart or -kard in the title reflects the orthography of Pahlavi writing, in which the letter may sometimes denote /d/. Date and authorship The individual chapters vary in age, style and authorship. Authorship of the first three books is attributed by the colophons to 9th-century priest Adurfarnbag-i Farrokhzadan, as identified in the last chapter of book 3. Of these three books, only a larger portion of the third has survived. The historian Jean de Menasce proposes that this survival was the result of transmission through other persons. The first three books were edited and in fact partially reconstructed, circa 1020, by a certain Ādurbād Ēmēdān of Baghdad, who is also the author of the remaining six books. The manuscript 'B' (ms. 'B 55', B for Bombay) that is the basis for most surviving copies and translations is dated 1659. Only fragments survive of any other copies. The Denkard is roughly contemporary with the main texts of the Bundahishn. Structure and content The Denkard originally contained nine books or volumes, called nasks, and the first two and part of the third have not survived. However, the Denkard itself contains summaries of nasks from other compilations, such as Chihrdad from the Avesta, which are otherwise lost. The natural divisions of the books are as follows: Books 3-5 are devoted to rational apologetics, book 4 to moral wisdom, and books 7–9 to exegetical theology. Book 3 Book 3, with 420 chapters, represents almost half of the surviving texts. Jean de Menasce observes that there must have been several different authors at work, as the style and language of the collection is not uniform. The authors are