Every year on April 21 is a highly significant day in Thai history as it marks the "Founding Day of Rattanakosin" or the birthday of Bangkok. In 2026, it will be the 244th anniversary since King Phutthayotfa Chulalok the Great (Rama I) graciously ordered the City Pillar ceremony on April 21, 1782, to bless the nation with prosperity.
After reclaiming independence during the Thonburi period, King Phutthayotfa Chulalok the Great moved the capital from Thonburi to the east bank of the Chao Phraya River. He saw that the eastern side offered better strategic advantages for defense and future city expansion.
On April 21, 1782, at 06:54 a.m., a significant event occurred: the royal ceremony to bury the City Pillar at the site of present-day Bangkok, symbolizing the official start of the Chakri dynasty's reign.
The time 06:54 a.m. was recorded as the moment the city's spiritual core was positioned at the "Victory in War" point, with the astrological ascendant in Aries, symbolizing courage and leadership—an interpretation acknowledged by historians and Thai astrologers from past to present.
The Bangkok City Pillar Shrine is not only a historical monument but also a spiritual focal point for Thai citizens. The practice ofpaying respects to the City Pillaris believed to strengthen stability in life and career and to invoke blessings for national peace. Within the shrine reside five key guardian deities: Phra Suea Muang, Phra Song Muang, Phra Kan Chai Si, Chao Pho Chet Khup, and Chao Pho Hok Klong, who protect and watch over the city.
The 244th anniversary of Rattanakosin on April 21 serves as a reminder of the roots, intricate culture, and resilience of the capital city through the ages. Celebrating and learning about this history ensures these values are passed on to future generations.