The Roman numeral MDCXLIV corresponds to the Arabic number 1644.
MDCXLIV = 1644
Symbols are written and read from left to right, from highest to lowest.
If number MDCXLIV is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 1644.
MDCXLIII is number 1643
MDCXLV is number 1645
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