An Duong Vuong Temple Festival is held on the 6th day of the first lunar month every year in Co Loa village, Dong Anh district, Hanoi. It is about 17 km from the center of Hanoi.
The festival begins with a procession called “văn chỉ” and “rước kiệu thành hoàng” (The Tutelary God’s Palanquin) of the 12 hamlets marching to the temple of the King. Leading the procession is a phờng bát âm (an ancient music band). Following it are elder village notables, and the “kiệu long đình” (royal palanquin) being carried. Thượng Temple is where the ceremony is performed with five-colour flags, a couple of pink horses and a couple of white horses on the two sides, the left and the right. In the center of the altar with an incense table is placed and loaded with the offerings, a glass box containing a pair of mandarin’s boots and the King’s weapons. However, the statue of the King and his “mũ bình thiên” (King’s hat) are kept inside the altar. After that, people of the 12 hamlets march around the Trọng Thủy well and then go back to the Ngự Triều communal house where only the palanquin of Cổ Loa is kept.