The Roman numeral MCCCXLIII corresponds to the Arabic number 1343.
MCCCXLIII = 1343
Symbols are written and read from left to right, from highest to lowest.
If number MCCCXLIII is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 1343.
MCCCXLII is number 1342
MCCCXLIV is number 1344
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