The 18th century to the middle of the 20th century was the Royal Palace of the Kingdom of Siam. It used to be the residence of the Thai royal family. The Grand Palace has an important position for the Thai royal family. The exterior of the building is glittering, finely crafted, and inlaid with a grain of different colors of amphibole, and the royal family's extravagance is fully felt on the building. The Grand Palace is one of the many royal palaces in Thailand. It is the most preserved, largest and most ethnic palace in the past. It brings together the essence of Thai architecture, painting, sculpture and decoration art. Its style has distinctive characteristics of Siamese architectural art and is highly appreciated by tourists from all over the world. It is called Thailand Art Encyclopedia.