3. Vines and Trellis 

The Army continued to make improvements on the structure. In time, grape vines and wisteria graced the trellises on the amphitheater’s perimeter, providing shade for dignitaries who attended ceremonies. Long into his retirement, Montgomery Meigs, known as the “Architect of Arlington National Cemetery,” offered suggestions on horticultural methods that reportedly resulted in “strong and vigorous vines and abundant fruit."