This project with the title "Astronomical chronology of the Eastern Mediterranean and Mesopotamia in the 2nd and 1st millennium BC" aims to harmonise the partially strongly diverging absolute chronologies of particular regions of the Mediterranean and Meopotamia in the 2nd millennium BC by means of directly documented synchronisms between rulers and by means of documented astronomical data.

The chronologies of Egypt, Assyria and Babylonia are interwoven by documented synchronisms. Concerning astronomical data Egyptian lunar data and Babylonian observations of planets, omen texts and records of eclipses will be evaluated. For a correct temporal assignment of ancient observed astronomical data consistent calculations are indispensable. The already existing computer programs for the calculation of solar eclipses and of last and first visibilities of the crescent moon have to be extended in order that lunar eclipses and the visibility phases of the planets can be calculated. The uncertainties of the text sources have to be taken into account when a comparison with the calculations is made. Since most astronomical events are cyclic in nature, additional constraints are needed to anchor the observed data correctly. Thereby documented synchronisms, ¹⁴C-data and the destruction- and debris level of the vulcanic eruption of Thera can help. A matching absolute chronology of the whole Mediterranean and the Near East would be an important benefit for all analyses dealing with the exchange of culture and trade in the 2nd millennium BC.