Bronze Dong Son drum lid, ages about 2,100-2,700 years or 200 years before Buddha era. The right side has a few cracks and a slight distortion. In the middle there is a star-like pattern. Dong Son drum originated in the northern of Vietnam. Found evidence in Thailandduring the Sukhothai period. In Traiphum Phra Ruang. In the Rattanakosin period was used in various important ceremonies.