Archaeology historical dating

An epoch is the date (year usually) when an era begins. It was used to identify the Roman year by a few Roman historians.Modern historians use it much more frequently than the Romans themselves did; the dominant method of identifying Roman years was to name the two consuls who held office that year.Chronology is the science of locating historical events in time.It relies upon chronometry, which is also known as timekeeping, and historiography, which examines the writing of history and the use of historical methods.Dendrochronology is used in turn as a calibration reference for radiocarbon dating curves.

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For example, during eight centuries the calendar belonging to the Christian era, which era was taken in use in the 8th century by Bede, was the Julian calendar, but after the year 1582 it was the Gregorian calendar.

Dionysius Exiguus (about the year 500) was the founder of that era, which is nowadays the most widespread dating system on earth.

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