M.) era, meaning that events were dated from the supposed beginning of the world as computed from the Book of Genesis in the Hebrew Pentateuch.According to the computation Eusebius used, this occurred in 5199 B. The Chronicon of Eusebius was widely used in the medieval world to establish the dates and times of historical events.It relies upon chronometry, which is also known as timekeeping, and historiography, which examines the writing of history and the use of historical methods.Radiocarbon dating estimates the age of formerly living things by measuring the proportion of carbon-14 isotope in their carbon content.While of critical importance to the historian, methods of determining chronology are used in most disciplines of science, especially astronomy, geology, paleontology and archaeology.
Dendrochronology is used in turn as a calibration reference for radiocarbon dating curves.
In the field of Egyptology, William Flinders Petrie pioneered sequence dating to penetrate pre-dynastic Neolithic times, using groups of contemporary artefacts deposited together at a single time in graves and working backwards methodically from the earliest historical phases of Egypt. Known wares discovered at strata in sometimes quite distant sites, the product of trade, helped extend the network of chronologies.
Some cultures have retained the name applied to them in reference to characteristic forms, for lack of an idea of what they called themselves: "The Beaker People" in northern Europe during the 3rd millennium BCE, for example.
By synchronizing an event it becomes possible to relate it to the current time and to compare the event to other events.
Among historians, a typical need to is to synchronize the reigns of kings and leaders in order to relate the history of one country or region to that of another. D.) is one of the major works of historical synchronism. The first contains narrative chronicles of nine different kingdoms: Chaldean, Assyrian, Median, Lydian, Persian, Hebrew, Greek, Peloponnesian, Asian, and Roman.