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History of the Agora The excavations of the Athenian Agora have uncovered about thirty acres on the sloping ground northwest of the Acropolis (Fig. 3). Material of all periods from the Late Neolithic to ... History of the Agora The excavations of the Athenian Agora have uncovered about thirty acres on the sloping ground northwest of the Acropolis (Fig. 3). Material of all periods from the Late Neolithic to modern times has been excavated, shedding light on 5,000 years of Athenian history. ... Three large stoas were built in the Agora in the 2nd century (Middle Stoa [17], South Stoa II [19], and Stoa of Attalos [22]) and the archive building (Metroon [8]) was rebuilt with a colonnaded facade.