The present bulwarks date back to the year 1554, when Charles V, Holy Roman emperor, ordered that the 31.2-metre-thick (6-foot) wall be reconstructed.
Charles V also ordered the weaponry and manpower to be replenished in 1554.
mnli hypothesis: Charles V also ordered the weaponry and manpower to be replenished in 1554. premise: The present bulwarks date back to the year 1554, when Charles V, Holy Roman emperor, ordered that the 31.2-metre-thick (6-foot) wall be reconstructed.