Uparat
In the reign of King Mongkut, Siam established the first standing navy and was divided into the Royal Navy and the Front Palace Navy. Sri Suriyawongse became the first ever Commander of the Royal Navy while the Front Palace Navy was commanded by Vice-King Pinklao himself. In 1860, King Mongkut ordered Sri Suriyawongse to lead the construction of Phra Nakhon Khiri at Phetchaburi to be a detached palace.