Krom Muen Marupongsiripat Palace, which is now Chachoengsao Museum is an archaeological site with historical significance. Not losing to the old city hall or the Prachin Provincial Government City Hall. When Thailand used political policies to lead the military and changed the system of governance from a quadruple to a clerical system. Chachoengsao is the location of the Prachin Province Office and Krom Muen Marupongsiripat good governance. Those who were wise in the field of government were appointed as governors at that time. Construction planning for various buildings in Prachin Province. it is actually the beginning of the city planning of Chachoengsao. Krom Muen Marupongsiripat Palace, which is a two-story wooden house. It was built as the residence of the rulers of that era, so it could be regarded as the first step. of construction "Government Housing" of Paet Riew. Another historical significance Which is the pride of the city people is that this palace used to be the residence of King Chulalongkorn. On the occasion of his visit to Chachoengsao twice, the portrait of His Highness, which had been given since his first visit with the handwriting saying, “Provided for the Prachin Provincial House (Chachoengsao City) as a souvenir of being here very comfortable From the 24th to the 29th of January 1907, R.S. 40 126 "Still belonging to the palace to this day"