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number

Twelve

Numbers & forms · Cosmos

A count of months in many lunar-solar schemes and of the later zodiac. Astronomy’s convenience, not a single sacred dozen.

Astrology

  • Twelve is associated with Calendar.

    Twelve months are a common lunar-solar convenience. The zodiac’s dozen is a later sky-division, not every culture’s year.

    from Claudius Ptolemy · Tetrabiblos, c. 150 CE

    associated with · sourced · documented

  • Twelve is used in Astrology.

    Hellenistic astrology counts twelve signs. Ptolemy’s handbook is one such count, not a Māori year and not a Chinese twelve-branch system by default.

    from Claudius Ptolemy · Tetrabiblos, c. 150 CE

    used in · sourced · documented

Mesopotamian tradition

  • Twelve appears in Mesopotamian tradition.

    MUL.APIN organizes months and sky sections in twelve-fold counts. A named Mesopotamian twelve in that compendium, not zodiac as the later sign-list alone and not a bare dozen slang.

    from Hermann Hunger and David Pingree · MUL.APIN, 1989 (this edition); tablets earlier

    appears in · sourced · documented

Egyptian religion

  • Twelve appears in Egyptian religion.

    The Book of the Dead and its night-boat neighbors divide the sun’s underworld road into twelve hours of night — named twelve speech in funerary sky time, not a zodiac twelve dump alone.

    from Raymond O. Faulkner (translation) · Book of the Dead, New Kingdom spells; Faulkner trans. 1972

    appears in · sourced · culturally specific

  • Twelve is used in Calendar.

    Twelve used in Calendar. A count of months in many lunar-solar schemes and of the later zodiac. A scheme for naming days. The Atlas keeps their meeting local, without dissolving either into a single meaning.

    from SHOE.BLUE · SHOE.BLUE, 2026

    used in · interpretive · modern interpretation

  • Thirteen is associated with Twelve.

    In Vitruvius’s Ten Books on Architecture, the moon circuits thirteen times in twelve months while the sun measures the same span once — thirteen and twelve are the paired moon-month counts of that year measure.

    from Vitruvius; Morris Hicky Morgan (translation) · De Architectura, 1st century BCE; Morgan English 1914

    associated with · sourced · documented

  • Apocalypse appears in Twelve.

    In Twining’s Symbols and Emblems, twelve figures at each side of a composition represent the four and twenty elders of the Apocalypse — twelve is the half-count of that Apocalypse elder set.

    from Louisa Twining · Symbols and Emblems of Early and Mediaeval Christian Art, 1852 (new ed. 1885)

    appears in · sourced · documented

  • Fifteen is used in Twelve.

    In Vitruvius’s Ten Books on Architecture, if columns are at least twelve feet and not more than fifteen feet high, the architrave height equals half the bottom thickness — twelve-to-fifteen is the height band of that architrave rule.

    from Vitruvius; Morris Hicky Morgan (translation) · De Architectura, 1st century BCE; Morgan English 1914

    used in · sourced · documented

  • Thirty is used in Twelve.

    In Vitruvius’s Ten Books on Architecture, if columns are from twenty-five feet to thirty, the height is divided into twelve parts — twelve is the part-count of that thirty-foot band.

    from Vitruvius; Morris Hicky Morgan (translation) · De Architectura, 1st century BCE; Morgan English 1914

    used in · sourced · documented

  • Twelfth is used in Twelve.

    In Vitruvius’s Ten Books on Architecture, hinge-stiles are one twelfth of the width of the whole aperture — the twelfth fraction measures that door stile.

    from Vitruvius; Morris Hicky Morgan (translation) · De Architectura, 1st century BCE; Morgan English 1914

    used in · sourced · documented

  • Seventh is used in Twelve.

    In Theophilus’s Divers Arts, more than twelve colour traits may never exist in each colour, and the seventh row seats among the tempered sequence — twelve is the trait cap of that colour row.

    from Theophilus Presbyter · On Divers Arts, c. early 12th century

    used in · sourced · documented

  • Sixth is used in Twelve.

    In Theophilus’s Divers Arts, the sixth row placement sits under the twelve-trait colour-row rule when tempering toward black — sixth and twelve govern that row seating.

    from Theophilus Presbyter · On Divers Arts, c. early 12th century

    used in · sourced · documented

  • Spiral is used in Twelve.

    In Ure’s Dictionary of Arts, Manufactures, and Mines, a spiral piece of metal is slightly boiled for twelve minutes in the parting sequence — twelve minutes is the boil span of that spiral slip.

    from Andrew Ure · Dictionary of Arts, Manufactures, and Mines, 1839 (and later PD editions)

    used in · sourced · documented

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