Dug as Metroon Porch Pit A and Pit C (layers II and III). ... 7th-6th c. B.C ... Dug as Metroon Porch Pit A and Pit C (layers II and III). Test trenches at the south end of the porch of the Metroon inside the SE corner of the Old Bouleuterion. Three layers, homogeneous in context, composed of dug bedrock fill, separated by distinct layers of poros working chips.