The foreign trading settlements
This were well-defined enclaves among canals immediately south and southeast of the walled city. They occupied both banks of the Menam or Chao Phraya River. The Dutch settlement, the "Hollander" factory, and compound, was the northernmost of the settlements on the east bank of the Menam. Its warehouses and offices were contained in a large, brick-and-plaster building, the largest of the commercial buildings in the city.
Opposite the Dutch was one of the three Chinese quarters, downstream from the Dutch, and on the same bank, was the English factory. Further downstream still, on the other side of a tributary canal, was the Japanese settlement.
In recent times they followed this pattern with tourism when they opened first Phuket to concentrate to tourists there after Ko Chang and a few places such as Pattaya just came up because of the Vietnam War. Thais always try to keep foreigners out of their core countryside.
They also put a lot of restriction on foreigners such make it impossible to buy any land and including condos etc. with it. Most foreigners don't know that many find out after a while they really don't own what some local people sold them with the help of some local "law twister".
The contrast of colors of which gilded spires against green groves was the most typical, how living conditions verged on the point of overcrowding both on land and water, and the sheer size of the walled city alone which some estimated as being close to 6 miles in circumference. They also noted that the city continued its spread out beyond its walls as if there were no threat of external attack. Until the 17th century, the city grows as big as London or Paris of that time and was one of the most interesting cities in the East.
There were English and Chinese settlement
Including St. Dominique's the center of the European Catholic community's town, it was a church originally founded by the Jacobite Portuguese and later joined by the French Foreign Mission.
A short distance further down the west bank' and north of the mouth of large, busy canal called Khlong Takhian, was the Jesuits' Church of St. Paul, again founded by the Portuguese and joined later by the French. The English Episcopal Church and its seminary were where St. Joseph's is today, opposite the southwest corner of the Island of Ayutthaya half-way between Wat Chai Watthanaram and Wat Phutthaisawan.
Well outside the city to the northwest was an academic establishment known then as the College of Nations. In reality, it was a religious school, and most likely a French Catholic one. There Christianity was taught and instruction in European languages was given to the children of local and international communities.
The standard of instruction was very high and it is on record that the youth of were taught French at this college to a high degree. In fact, six Asian students of several nationalities were sent from this college to make competitive exams in France. One of these students gained first place in his exam and the others scored highly.
In comparison to the Japanese and Chinese who are Mahayana Buddhists, the other Asian foreigners are not well-known. 17th-century European maps show settlements of Cochin Chinese (Mahayana Buddhist, Vietnamese and Muslim, Chams from central Vietnam), Malays (which include Sumatrans as well as Javanese) and Macassar (from Mangkasara, the principal island of the Celebes) today Indonesia.
All of them, except for the Cochin Chinese, were from predominantly Sunni Muslim countries. The Iranians at the city were Shiah Muslims, or Shiites, and remained apart from the Southeast Asian Muslim settlements.
For all their religious diversity Europeans and Asians of the extra-mural settlements had but one important reason for staying there, and that was the better to promote their separate commercial interests - to trade and to conduct profitable commercial activities.