ยุทธศาสตร์ แรก ที่ พระเจ้า อู่ทอง ปฏิบัติ ก่อน ที่ จะ สถาปนา กรุง ศรีอยุธยา เป็น ราชธานี คือ อะไร

Phra Nakhon Si Ayutthaya or Ayutthaya Province was the capital of Thailand. There were some evidences that it was the city situated on the plain of Chao Phraya River since Buddhist era 16-18, such as the sign of city, ancient remains, antiques, the annals, as well as the stone inscription, which is the contemporary evidence that most coincide with the incident (Ayothaya or Ayutthaya Kingdom was situated on the east of Ayutthaya isle). It was one of the prosperous cities in terms of politics, administration, and culture. In regard to administration, three administrative laws were enforced: Comprehensive Law, Slavery Law, Law of Obligation.

Ramathibodi I (Uthong) established Ayutthaya as the capital city in 1350 and it had been the center of Siam for 417 years. During those years, there were 33 Kings from 5 different dynasties: Uthong dynasty (3 Kings), Suphannaphum dynasty (13 Kings), Sukhothai dynasty (7 Kings), Prasat Thong dynasty (4 Kings), Ban Phlu Luang dynasty (6 Kings) to ruled over Ayutthaya. It lost independence to Myanmar twice. The first loss of independence was in 1569 and King Naresuan retrieved independence in 1584. The second loss of independence was in 1767 which King Taksin retrieved independence in the same year. Thon Buri was established to be the capital and people from Ayutthaya were relocated to Thon Buri to build the stable city. However, there were some people who remained settle in Ayutthaya and some who escaped to the forest came back to live around the city. They assembled and established themselves as the province called "Krung Kao" or The Old City.

Phra Phutthayotfa Chulalok or Rama l founded Krung Kao as a provice as same as in Thon Buri period. Later, Chulalongkorn or Rama V initiated the administrative reform for both central and provincial region. In regard to provincial administration, he applied the "Tesaphiban Administrative System" (local government) by assembling the 3-4 neighboring cities to form as a "Monthon" (administrative subdivisions) that governed by a royal commissioner. In 1895, he establishd Monthon Krung Kao that comprised of cities i.e. Krung Kao or Ayutthaya, Ang Thong, Saraburi, Lop Buri, Phrom Buri, In Buri, and Sing Buri. Afterwards, he merged In Buri and Phrom Buri with Sing Buri and established Monthon administrative office. In 1926, Monthon Krung kao had changed to Monthon Ayutthaya. As a result, Ayutthaya became a center of administration. Creation of public utilities had great impact on the development of Ayutthaya.

Phra Phutthayotfa Chulalok or Rama l founded Krung Kao as a provice as same as in Thon Buri period. Later, Chulalongkorn or Rama V initiated the administrative reform for both central and provincial region. In regard to provincial administration, he applied the "Tesaphiban Administrative System" (local government) by assembling the 3-4 neighboring cities to form as a "Monthon" (administrative subdivisions) that governed by a royal commissioner. In 1895, he establishd Monthon Krung Kao that comprised of cities i.e. Krung Kao or Ayutthaya, Ang Thong, Saraburi, Lop Buri, Phrom Buri, In Buri, and Sing Buri. Afterwards, he merged In Buri and Phrom Buri with Sing Buri and established Monthon administrative office. In 1926, Monthon Krung kao had changed to Monthon Ayutthaya. As a result, Ayutthaya became a center of administration. Creation of public utilities had great impact on the development of Ayutthaya.

During the time that Phraya Boran Ratchathanin (Porn Dechakhup) was the Intendant of Monthon Krung Kao, he preserved the ancient remains in many ways. He reconstructed the right hand and topknot of Phra Mongkhon Bophit, inspected the interior ancient palace, and constructed the Sanphet Prasat Palace at the former foundation for The Fortieth Anniversary Celebrations of King Rama V's Accession to the Throne in 1908, as well as established the Ayutthaya Museum in Chandrakasem Palace. During the period that Field Marshal Plaek Pibulsongkram was the Prime Minister, there was the policy for ancient remains reconstruction in Ayutthaya to celebrate the 25th Buddhist century anniversary. Moreover, in 1955, the Prime Minister of Myanmar visited Thailand and granted 200,000 baht to reconstruct temples and Phra Mongkhon Bophit, which was the beginning of ancient remains reconstruction in Ayutthaya. Later, Fine Arts Department was the main agency to process the reconstruction. Afterwards, United Nations Educational, Scientific and Cultural Organization or UNESCO resolved to register Phra Nakhon Si Ayutthaya, covered Ayutthaya Historical Park area, as the "World Heritage" on 13 December 1991.

Ayutthaya was the capital city for 417 years, from 3 April 1350 to 7 April 1767. There were history of administration, independence retrieval, bravery, and tradition and culture. It was the prosperous city with food and crops as the saying, "There are fish in the waters. There is rice in the fields". There were many temples, palaces, sacred places, and sacred objects in Ayutthaya.