See the related link for information about the origins of Roman numerals.
it was invented in rome in 1863
In ancient Rome, 754BCE.
The idea of the Roman numeral system was first conceived by the mysterious Etruscans who once ruled the Romans
The Babylonians invented 0, numeral 1 known pre that time
Hindu Arabic numeral system was invented by Indian mathematicians.
India.
It was first invented in the 4th century BC. By 525 AD, Dionysius Exiguus was using Roman numerals
2000 was invented in the 8th century as a replacement for the Roman numeral MM.
When primitive man began to settle into farming communities he needed some kind of method to keep a tally of his farming stock and so numerals, which originated from notches on a stick, were invented out of necessity. The Roman numeral system was not invented by the Romans but by the Etruscans who once ruled the Romans.
around 5th Century AD to 16th Century AD (Middle Ages)
It was their only recognisible number system like our Arabic-numeral system (0,1,2,3,4,5,6,7,8,9)
The Roman numeral system is an example of how calculations were done before the introduction of zero