Only the giant portal, 5.5 m (18 ft) tall, was in place when work stopped, but it gives an indication of how immense the whole task would have been.
Not even the portal had been completed when work stopped.
mnli hypothesis: Not even the portal had been completed when work stopped. premise: Only the giant portal, 5.5 m (18 ft) tall, was in place when work stopped, but it gives an indication of how immense the whole task would have been.