1During the assault on the Greek city of Corinth of Mummius in 146 BC, much of the city was destroyed, leaving buildings razed to the foundations. However a few structures have survived and were re-used during the Roman re-occupation. This has ensured excellent preservation of Pre-Roman waterproofing mortars. Important locations in Corinth with these remains are in the Fountains of Peirene and Glauke, at the Asklepieion and its associated springs and importantly at the springhouse of Upper Peirene on the Acrocorinth where a unique pre-Roman concrete barrel vault is preserved (Fig. 1).

2This paper will present both petrographic and preliminary chemical analyses which indicate that these materials had hydraulic properties, which has been previously overlooked.

Pre-Roman Mortars at Corinth

3A number of buildings and monuments at Ancient Corinth, dating from as early as the 6^th century BC up until the mid2^nd century BC destruction of Corinth by Mummius, incorporate waterproofing mor