Extensive remains of vast Mycenaean citadel revealed
A team of archaeologists is excavating the remains of a vast ancient Mycenaean citadel, known as Glas or Kastro (castle)….The area is estimated to measure ten times the size of the ancient citadel of Mycenaean Tiryns and seven times that of Mycenae.
In the closing years of the 14th century BC (LH IIIA2) a large-scale engineering project of gigantic proportions was realized in Boeotia, perhaps a joint venture of the neighboring palaces of Thebes and Orchomenos, which effectively transformed the Kopais basin (ca. 20,000 ha) into the most fertile plain on mainland Greece: the submerged marshland was artificially drained by means of an ingenious and complex drainage control system ….
The Kopais drainage project was colossal by both ancient and modern standards: it is estimated that 2,000,000 cubic meters of earth were moved to build the extensive dykes and massive embankments (2m high and 30m wide) running for many kilometers on the periphery of the basin, more than 250,000 cubic meters of stone were used to revet the embankments, and the water overflow of the main canal is estimated at 100 cubic meters per sec….