A bloodless revolution in 1932 led to a constitutional monarchy.In alliance with Japan during World War II, Thailand became a US ally following the conflict.
Known as Siam until 1939, Thailand is the only Southeast Asian country never to have been taken over by a European power.
It is listed as an endangered species by the International Union for Conservation of Nature.
The loose change eventually formed a heavy ball in her stomach weighing 5 kilograms (11 pounds).
The weight cracked the turtle's ventral shell, causing a life-threatening infection.
Five surgeons from Chulalongkorn University's veterinary faculty patiently removed the coins over four hours while "Bank" was under general anesthesia. Now it's up to Bank how much she can recover," said Pasakorn Briksawan, one of the surgical team.