Art of early Ayutthaya period (15th century) found in Gru of Wat Mahathat small west side stupa (prang) in 1950. Simulation of belled-shape stupa (round stupa) it is able to be separated into 3 pieces. The base part has inverted lotus design, body part as bell-shaped made of crystalline rock, and Plong Chanai (top part) is made of gold.