What this unit was
Roman nundinal cycle is modelled here as a time standard of the Roman calendar tradition, associated with Roman world during Republican and early Imperial use. The converter represents one nundinum as 691200 s; its basis is inclusive-eight-day-market-cycle. This is a defined or exact matrix anchor.
Within that setting, the unit belonged to a working system for civil scheduling, ritual or administrative cycles, and astronomical calculation. It should be read with its period, locality, and evidential basis attached, not as a universal value shared by every culture using a similar name.
Evidence of use and sources
The working value is traceable to Smith Dictionary Hora and calendar reference. Its record is classified as medium confidence and uses the stated basis rather than an assumed culture-wide constant.
Three directly pertinent excerpts from the supplied library are available.
“The rest of the Measures are founded on known proportions.”
Tables of antient coins, weights, and measures, PDF p. 78. reconstructed proportional systems
“Stadium contain'd 125 Roman Paces, or 625 Feet”
Tables of antient coins, weights, and measures, PDF p. 81. Roman distance relationship
“the trade value of the Attic standard, and ... the coinage value”
Flinders Petrie, Ancient Weights and Measures, PDF p. 31. trade and coin systems must be distinguished
Working definition
Roman nundinal cycle is represented as a Roman calendar standard associated with Roman world during Republican and early Imperial use.
The converter uses 691200 s per unit.
How to use it
Basis: inclusive-eight-day-market-cycle; confidence: medium. A shared historical name does not make this value portable to another period or polity.
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