Between 1563 and 1565 , a huge amount of earth was excavated .
Between 1563 and 1565 , a huge amount of earth was used to construct new terraces ; arcades , grottos , niches , and nymphaeums were constructed .
Between 1563 and 1565 , a huge amount of earth was excavated and used to construct new terraces ; arcades , grottos , niches , and nymphaeums were constructed .