Celadon or green-glazed stoneware is one of the greatest achievements of Korea’s Goryeo dynasty. Goryeo potters absorbed Chinese techniques and surpassed that country’s examples by further refining a technique known as sanggam. The time-consuming and complex process of sanggam involves carving a motif, then filling it with white and/or red clay (which turns black after firing) before applying the final bluish-green glaze. This vase is decorated with two large oval-like frames containing a scene of children playing in a bamboo garden, and a motif of cranes flying through clouds, symbolizing a wish for fertility and longevity.