Mostly architectural. The only pragmatic benefit is it allows powerful people to go "outside" without going out in public. Take a break, walk in the semi-priv

Mostly architectural. The only pragmatic benefit is it allows powerful people to go "outside" without going out in public. Take a break, walk in the semi-private garden. During the cold war, we used to joke that the flagpole in the center at the Pentagon was the most precisely surveyed pole in the World (by the Soviets).