Speaker: Ioannis Mylonopoulos, Associate Professor, Columbia UniversitySince 2014, Columbia University’s Department of Art History and Archaeology has conducted excavations and geophysical survey at the sanctuary of Poseidon in Onchestos, the seat of the Boeotian Confederacy and a major sacred site of Central Greece, under the auspices of the Athens Archaeological Society. Excavation focuses on two large areas between Thebes and Haliartos, where geomagnetic survey also provided much information on subsurface architectural remains. The excavation has already yielded a rich array of finds: vases and vase-fragments (several bearing graffiti), numerous bronze objects (including several strigils), bronze and silver coins, weapons (among them a fully preserved sword), objects associated with horse- and chariot races, and many architectural elements (including several architectural terracotas bearing floral and abstract decoration in black, white, and red color on a beige background).