What are the names of the numbers which in history are customary to designate centuries? Who invented them?

In everyday life, we often use numbers, which are now commonly referred to as Arabic, although their invention clearly belongs to non-Arabs. In historical science today, it is customary to use several systems of numerical designation. specifically for centuries it is customary to apply the Roman system. Today, scientists are of the opinion that such numbers were invented by the Etruscans, who were one of the tribes on the Apennine Peninsula that gave impetus to the development and establishment of the Roman Republic and Empire.