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Computus, [Text 3]
Additional title: Incipit conpotus magistri Johannis de sacro buscho
Sacro Bosco, Joannes de, active 1230 (Author)

Renaissance and medieval manuscripts collection

Calendar, tables for art of computus, computus, quadrans, de sphaera, algorismus, cautelae

Dates / Origin
Date Created: 1240 - 1260 (Approximate)
Place: Paris, France
Library locations
Manuscripts and Archives Division
Shelf locator: MssCol 2557
Shelf locator: MA 69
Religious books
Content: Incipit: Conpotus est scientia considerans tempora ex solis et lune motibus
Content: Rhyme at the end begins, "M. christi bis c. quarto deno quartus anno/ De sacro buscho discrevit tempora ramus . . . (incorporating the date 1244)
Content: Historiated initial of the author pointing to the sun; explanatory notes and verses in the margins, [f. 14r] -- Chart showing the solar system with earth at the center of seven concentric spheres; grotesques, [f. 17r] -- Page of text, initial with penwork, [f. 19r] -- Notes in text expand the names of the months and the names of the zodiac; chart integrating months and zodiacal signs; animal and human figures, [f. 23r] -- God seated in the center, surrounded by a circular serpent biting its own tail as a symbol of the returning cycles of the year, [f. 29r] -- Circular diagram labeled "Garlandus" and "Dyonisius" with series of letters a-g and numbers 1-7, [f. 35v] -- Circular chart correlating directions, winds, elements, seasons, temperaments, qualities, and ages; in the spandrels, grotesques, a fighting man and a queen, [f. 38v] -- Orbit of the sun with corresponding light and dark sides of the moon, [f. 43v] -- The earth in the center, surrounded by a tail-biting dog, the moon and its phases, the sun on its orbit, correlated to signs of the zodiac, [f. 44r] -- Chart of the decemnovenale cycle, the cycle of epacts, and the cycle of the "claves", [f. 66r]
Type of Resource
NYPL catalog ID (B-number): b12455533
MSS Unit ID: 2557
Photo Order: 62292
Digital Scriptorium 1.0 ID: NYPL MA 069
Universal Unique Identifier (UUID): 1fbe4680-28ab-013b-27fe-0242ac110002
Rights Statement
The New York Public Library believes that this item is in the public domain under the laws of the United States, but did not make a determination as to its copyright status under the copyright laws of other countries. This item may not be in the public domain under the laws of other countries. Though not required, if you want to credit us as the source, please use the following statement, "From The New York Public Library," and provide a link back to the item on our Digital Collections site. Doing so helps us track how our collection is used and helps justify freely releasing even more content in the future.

Item timeline of events

  • 1240: Created (Approximate)
  • 2022: Digitized
  • 2023: Found by you!
  • 2024

MLA Format

Manuscripts and Archives Division, The New York Public Library. "Computus" The New York Public Library Digital Collections. 1240 - 1260.

Chicago/Turabian Format

Manuscripts and Archives Division, The New York Public Library. "Computus" New York Public Library Digital Collections. Accessed February 4, 2023.

APA Format

Manuscripts and Archives Division, The New York Public Library. (1240 - 1260). Computus Retrieved from

Wikipedia Citation

<ref name=NYPL>{{cite web | url= | title= (text) Computus, (1240 - 1260)|author=Digital Collections, The New York Public Library |accessdate=February 4, 2023 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>