The second turning point begun during the colonization era in 18th century, the Western set numerous conditions to occupy the areas of the Asian countries. At that time, Siam country laid plans to manage that threat to save the land as much as possible under the most important condition: to preserve the royal prerogative and absolute power of the elite. One of the survival methods was to develop the country to be on a same level with the Great powers. At this point, architecture was employed with aims at shifting paradigm of Siam to be civilized