The roofs of substantial buildings in classical Athens were covered with overlapping tiles. Antefixes were the outermost tiles, often decorated with floral or figural motifs. These examples are said to have come from a small structure on the Athenian Akropolis. The palmettes are variants of those that appear on contemporary vases.
Said to come from the Athenian Akropolis
Richter, Gisela M. A. 1953. Handbook of the Greek Collection. pp. 70, 212, pl. 52k, Cambridge, Mass.: Harvard University Press.