Known simply as Wat Suthat, this royal temple is one of the few premier royal monasteries (Ratchaworamahavihara) of Thailand and serves as the temple of the reign of His Majesty King Ananda Mahidol (Rama VIII). It is located in the inner part of Phra Nakhon and is distinguished by the iconic Giant Swing situated in front of the temple. In the early Rattanakosin era, King Buddha Yodfa Chulaloke (Rama I) commissioned the construction of this temple in the inner city area in 1807. It was originally named "Wat Mahasuthawas" and was built in a low-lying area known as Dong Sakha. To create a suitable site for the temple, the king ordered the land to be filled in. The building of the ordination hall was prioritized to enshrine Phra Sri Sakayamuni, a large Buddha image that was transferred from Wat Mahathat in Sukhothai. However, the project was not completed before the end of his reign, leading to the temple being referred to as Wat Phra To, Wat Phra Yai, or occasionally, Wat Phra Chak. It wasn't until the reign of King Buddha Loetla Nabhalai that the temple's construction continued, with the king personally inscribing the main doors of the ordination hall. Unfortunately, he also passed before this construction was completed. The temple was finally finished during the reign of King Nangklao (Rama IV) in 1847, and it was officially named "Wat Suthat Thep Wararam." Historical records show it was sometimes referred to as "Wat Suthat Thep Tharam." During the reign of King Chulalongkorn (Rama V), the names of the principal Buddhas in the ordination hall, chapel, and sermon hall were harmonized to "Phra Sri Sakayamuni," "Phra Phutthatree Lokchet," and "Phra Phuttha Sirethmuni."