The capital city of Thailand was Ayutthaya in the 15th century and after the fall of Ayutthaya King Taksin established his new capital of Thonburi
in 1782 Phra Buddha Yodfa (Rama I) moved Thailand’s capital from Thonburi, he wanted to build a city worthy of the previous kingdom of Ayutthaya. That is Bangkok. The plot of land that Bangkok was built on was then known as Bang Kok, which means “The Village of Plum Trees.” Over time, this name was forgotten by the locals but survived in the international appellation Bangkok. In fact, the Thai people don’t usually call their capital city “Bangkok” at all.
To Thai people, Bangkok is known as Krung Thep. (City of Angels) which is a shortened version of the official Thai name of Krung Thep Maha Nakhon. But that’s not the end of it. The Thai name for Bangkok is the longest name for a capital city in the world and is listed in the Guinness Book of Records.