Early Zen Rock Garden

Quick answer：

Early Zen Rock Gardens, known as 'Karesansui' in Japanese, are traditional Japanese rock gardens that represent landscapes of mountains and water through carefully arranged stones and raked sand. They are an integral part of Zen Buddhist practice and are often used for meditation and reflection. These gardens emerged in the 14th century and became more popular in the 16th century, with the Edo period seeing their peak development.