The Uposatha was restored, for the first time, during the reign of the King Rama IV, when he attended Wat Prayurawongsawas so as to offer royal kathina robes.
The principal Buddha-image inside the Uposatha portrays the posture of “Conquering the Evils”..
In 1992, King Rama IX graciously named the statue as Phra Phuttathamma Wichettha Satsada, which literally means the “Lord Buddha who is the best in Dhamma”.