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 ... More important, however, are the differences in the stance, armor, and garments of the warriors, because it is the composition of the warrior scene that, more than any other part of the decoration, makes the two vases look alike.