Intaglio is a type of relief sculpture used in the construction of Borobudur. It consists of a design carved into the surface, with raised portions that are incised or cut away from the stone’s flat background. The use of intaglio allows for detailed decoration and intricate designs to be created on the monument’s walls and ceilings. Intaglio also provides structural stability to Borobudur, as its carving reinforces the integrity of each wall by connecting it to other parts of the structure. Intaglio serves an aesthetic purpose; it adds texture and depth to create a visually appealing environment within Borobudur.