The earliest walls in Butrint are found in the Acropolis and consist of four sections of enormous polygonal stone walls, each of which is composed of massive blocks perfectly connected together. Some archaeologists have interpreted them as part of a fortification belonging to the archaic period. This fortification would be enough to surround an area of at most 4 hectares. However, it is more likely that these four sections of the erected walls formed a terrace on the south side, which was used for summits. The walled area almost certainly provided shelter located on the east side at the highest level of the hill. Excavations near the archaic wall by the Albanian-Greek team in 1989-94 found a significant amount of pottery, including proto-Corinthian and Corinthian equipment dating from the 7th century BC and Attic pottery of the 6th century BC Whether this huge wall was a terrace or an early fortification suggest that it was built as an isolated part of the flourishing Corinthian colony in Corfu. One part of this huge wall was built during the Roman period to guarantee the safety of the upper part of the Acropolis.