Introduction to the Sky Palace Complex: The Sky Palace Complex is an honorific to the main building of the Grand Palace. It is said that the existing old building was built by King Rama I in 1785. By the time of Rama IV, it became the king's residence, and at the same time the AMARINTARAUINICHAIMAHAISURAYAPIMAN Palace (also known as AMARINUINICHAI Palace) was opened to the public. However, most people cannot see the buildings in this palace complex.