id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-6839 Roman numerals - Wikipedia .html text/html 10239 1677 71 Roman numerals are essentially a decimal or "base 10" number system, but instead of place value notation (in which 'place-keeping' zeros enable a digit to represent different powers of ten) it uses a set of symbols with fixed values. Even the post-renaissance restoration of a largely "classical" notation has failed to produce total consistency: variant forms are even defended by some modern writers as offering improved "flexibility".[3] On the other hand, especially where a Roman numeral is considered a legally binding expression of a number, as in U.S. Copyright law (where an "incorrect" or ambiguous numeral may invalidate a copyright claim, or affect the termination date of the copyright period)[4] it is desirable to strictly follow the usual style described below. The Colosseum was constructed in Rome in CE 72-80,[57] and while the original perimeter wall has largely disappeared, the numbered entrances from XXIII (23) to LIIII (54) survive,[58] to demonstrate that in Imperial times Roman numerals had already assumed their classical form: as largely standardised in current use. ./cache/en-wikipedia-org-6839.html ./txt/en-wikipedia-org-6839.txt