Broneer, O ... American School of Classical Studies at Athens ... The calyx-krater of Exekias, first published in 1937,1 was discovered at the bottom of a well in the American School excavations on the North slope of the Acropolis in Athens. The circumstances of discovery ... 1956 ... The spiral design on his breastplate appears at the edge of the fragment beneath his right arm. ... One striking dissimilarity is shown by the new fragment from the center of the scene. ... This is probably true of the poros head of Herakles from the archiac temple, Hesperia, VIII, 1939, pp. 91 ff.