http://agathe.gr/publications/monographs.html
Monographs Excavations in the civic and cultural center of classical Athens began in 1931 and have continued almost without interruption to the present day. The first Athenian Agora volumes presenting ... The earliest church on the site, built over a wall of the 5th-century B.C. ... The original plan was revealed as a tetraconch cross-in-square with dome on pendentives carried on arches supported by four freestanding columns, the west of the four apses penetrating into the narthex. ... Finally in 1876-1882 (Period IV) the west end was again rebuilt and the last vestiges of the west apse removed.
