Roman Numeral Guides
Each guide explains one part of the system in depth, with worked examples and the sources behind every historical fact.
- How Roman numerals workThe seven symbols, the four rules and the mistakes people make most, with worked examples.
- History of Roman numeralsWhere the symbols came from, how Romans calculated and how the system survived Arabic numerals.
- Large Roman numeralsWhy the standard stops at 3,999 and how the bar (vinculum) writes 4,000, 10,000 or a million.
- Why clocks use IIIIIIII is an old form that clockmakers kept. What is documented, and the theories, each with its source.
- Centuries in Roman numeralsFrom year to century, why the 21st century began in 2001 and how each language writes centuries.
- Dates in Roman numeralsDay, month and year each become a numeral, in the order your country uses. Examples and a final check.