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Roman Ruins as an Experiment for Radiocarbon Dating of MortarHajdas, Irka; Trumm, Jürgen; Bonani, Georges; Biechele, Carol; Maurer, Mantana; Wacker, Lukas (Department of Geosciences, The University of Arizona, 2012-10-15)The remains of Vindonissa, the Roman legionary camp in Switzerland, have been the subject of extensive archaeological studies. Knowledge of the building time plays a role in reconstructions of the history of this site. We radiocarbon dated mortar samples selected from one of the Roman monuments (Westtor) as well as a nearby Medieval monastery. 14C ages obtained on the first fraction and second fraction of very short dissolution appear close to the expected Roman age of ~2000 BP, while the monastery is dated to historic times, after AD 1308.