Aside from its structural beauty, the temple is popular for yet another reason. The main Ubosoth (Ordination Hall) houses the venerated image of the Emerald Buddha, considered as a form of amulet by the Thais. Therefore, the temple is also known as 'The Temple of the Emerald Buddha'. However, unlike the name, the dark green image is not made of emerald, but green jadeite or jasper. This 2-ft tall statue of the Buddha is perched high atop a gilded altar and holds tremendous religious implication for the Thais.
The hall in which the statue is enshrined contains Late Ayutthaya-style
murals, depicting the various phases of Buddha's life, the cycle
beginning with the birth of the Buddha, emblazoned in the middle of the
left wall. The surrounding porch of the main altar is equally
magnificent and the door panels are detailed with beautiful
mother-of-pearl decorations. Besides, three pagodas flank the north of
the Ubosoth. There is also a sacred black stone statue of a hermit
towards the west of the hall, frequented by devotees seeking good
health.The surrounding walls depict various scenes from the Ramakian and the five-meter high giants (yaks) and monkey kings inside the temple area are equally noteworthy. Besides, one of the most important highlight is the costume-changing ritual, where the King changes Buddha's robes three times a year. During the summer, the statue is decked with a crown and jewelry. In the winter, a golden shawl drapes the statue and during the monsoons, it is covered in gilded robe of a monk. Thus, with its religious significance and dazzling beauty, Wat Phra Kaew finds place as the holiest of all shrines in Bangkok.