Indeed dear @soulsdetour. Ancient civilizations and their builders I believe have deliberately incorporated gardens and other green spaces into their majestic estates not only for aesthetic and prestigious purposes but also for general health standards. As primitive as their construction technologies might be, they already understood our innate connection to Mother Nature as human beings, plus the numerous advantages they enjoyed by patronizing her. 👍
On the flip side, if they were not yet aware of the positive results gardens offer to humanity and to the environment, they probably must have discovered it by accident - through the obvious manifestations of people's well-being who have cultivated these wondrous landscapes of nature. 😊