The Royal Nine-Tiered Umbrella is considered the most sacred and ancient of the royal regalia of Thailand. A royal umbrella consists of many tiers, five for the prince, seven for the crown prince and unconsecrated king, and nine for a fully sovereign and crowned Thai king. Until the coronation rites are completed the new king will not be able to sit on the throne under the nine-tiered umbrella.

The coronation of the monarch of Thailand is a ceremony in which they are formally consecrated by anointment and crowning. The ceremony is divided into two main events: the coronation rites and the celebration of the Assumption of the Residence. The coronation rites are a blend of Hindu and Buddhist traditions dating back several centuries. The rites included the purification bath of the king, the anointing of the king, the crowning of the king, and the investiture of the royal regalia, the royal utensils, and the royal weapons of sovereignty. The Assumption of the Residence is a private housewarming celebration by members of the royal family at the Grand Palace.