Ground deformation structures preserved on the decorated floor of the Early Christian Basilica located in the vicinity of the ancient Lechaion Harbour, Corinth, are indicative of reccurent eathquake induced ground liquefaction events. Through the study of archaeological, geophysical and stratigraphical data, the surface structures were correlated with substratum features and three potential ground liquefaction events are suggested. The results are indicative of at least one seismic event before the construction of the Early Christian Basilica that has caused considerable damages to the ancient harbour installations, a second event (524 A.D.) that caused considerable but repairable damages to the temple and a third event that relates to irreparable damages and thus the destruction of the Basilica in A.D. 551.