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320 MedicBval Military Architectttre. portal, but rises above as a broad tower. Its lateral portions project 6 feet beyond the portal, and form porters' lodges. The portal, lo feet wide by 20 feet high, was defended by gates, port- cullis, and stockade. It is guarded by loops on each side from the lodges. Those opening from the portal, measure 20 feet by 10 feet,
