via Bangkok Post, 21 December 2017: Built in 1869, Wat Ratchabophit is the symbolic temple of King Chulalongkorn (Rama V) and one of two temples to enshrine the ashes of the late King Bhumibol (Ramax IX).
Apart from Wat Bowon Niwet, which is King Bhumibol Adulyadej’s symbolic temple, Wat Ratchabophit on Ratchabophit Road is one of only two temples that enshrine his ashes. Since Nov 7, when the temple started permitting the general public to pay respects to the royal remains, many have flocked there for this purpose.
Source: Where royal souls reside