Southeast Asia c. 1400 CE, showing Lan Xang kingdom in teal, Khmer Empire in red, Ayutthaya Kingdom | Ayutthaya Kingdom in violet, Sukhothai kingdom in orange, Champa in yellow, Kingdom of Lanna in purple, Dai Viet in blue.

* Thailand: Sukhothai, Ayutthaya, Wat Phra Kaew, Wat Doi Suthep.

Thai people established their own states starting with Sukhothai, Chiang Saen and Chiang Mai and Lanna Kingdom and then Ayutthaya kingdom.

After the Ayutthaya kingdom had emerged and expanded its influence from the Chao Phraya valley, Sukhothai was finally subdued.

Southeast Asia c. 1400 CE, showing Khmer Empire in red, Ayutthaya Kingdom | Ayutthaya Kingdom in violet, Lan Xang kingdom in teal, Sukhothai Kingdom in orange, Champa in yellow, Kingdom of Lanna in purple, Dai Viet in blue.

* The Sukhothai Kingdom in northern Thailand becomes a tributary state of the Ayutthaya Kingdom.

Ayutthaya began its hegemony by conquering northern kingdoms and city-states like Sukhothai, Kamphaeng Phet and Phitsanuloke.

The slightly higher northern plains have been farmed for centuries and saw a major change from the 13th century onwards during the Sukhothai Kingdom in the 13th and 14th centuries and the Ayutthaya Kingdom that succeeded it when rice-growing intensified with the introduction of floating rice, a much faster-growing strain of rice from Bengal.

In 1378, the armies from Ayutthaya kingdom invaded and put Sukhothai under her tributary.

Ramesuan was also crowned as the King of Ayutthaya in 1448, thus began the personal union between the Kingdom of Sukhothai and Ayutthaya.

In 1451, Yuttitthira, a Sukhothai royalty who had conflicts with Trailokanat of Ayutthaya, gave himself to Tilokaraj.

After the fall of Sukhothai it fell it its successor, the Ayutthaya kingdom and was one of the tributary kingdoms or 1st class provinces.

In 1289 it sent another embassy to China, but soon became part of the Thai kingdom of Sukhothai and later Ayutthaya.

Historically Pattani Province was the centre of the semi-independent Malay Sultanate of Patani, but paying tribute to the Thai kingdoms of Sukhothai and Ayutthaya.

The town Phichit was established in 1058 by Phraya Kotabongthevaraja, and was first part of the Sukhothai kingdom, and later of Ayutthaya.

Southeast Asia c. 1400 CE, showing Khmer Empire in red, Ayutthaya Kingdom | Ayutthaya Kingdom in violet, Lan Xang kingdom in teal, Sukhothai kingdom in orange, Champa in yellow, Kingdom of Lanna in purple, Dai Viet in blue.

Ayutthaya became the second Siamese capital after Sukhothai.

In the 14th century, the centre of Thai power passed from Sukhothai to the more southerly Ayutthaya, in territory which had formed part of the Khmer empire.

The Thai version of the legends were first written down in the eighteenth century, during the Ayutthaya kingdom, following the demise of the Sukhothai government.

Intersecting mandalas circa 1360: from north to south Lan Xang, Lannathai | Lanna, Sukhothai kingdom | Sukhothai, Ayutthaya kingdom | Ayutthaya, Khmer empire | Angkor and Champa.

The Thai kingdoms of Lanna and Sukhothai also exercised power in the region, avoiding conflict with the Yuan Dynasty to the north.

Traditional Thai historians considered the foundation of the Sukhothai kingdom as the beginning of their nation because little was known about the kingdoms prior to Sukhothai.

Historically Narathiwat was the part of the semi-independent Malay Sultanate of Patani, paying tribute to the Thai kingdoms of Sukhothai and Siamese kingdom of Ayuthia.

Yet, as historian Thongchai Winichakul notes, kingdoms such as Sukhothai lacked distinct borders, instead being centered on the strength of the capital itself.

For kings of the precursor kingdoms of Ayutthaya and Sukhothai, see their respective subcategories.

From historical evidence, it is believed that Phetchabun was established by two kingdoms – namely the Sukhothai Kingdom and the Ayutthaya Period of the great King Narai.

The rise of the Tai kingdoms of Sukhothai ( 1238 ) and Ayutthaya ( 1350 ) resulted in almost ceaseless wars with the Cambodians and led to the destruction of Angkor in 1431.

At the time of the Sukhothai kingdom, the Nakhon Si Thammarat kingdom was already listed as one of the kingdoms under control of the Thai, which it has remained during most of its history.

Nakhon Si Thammarat Kingdom or ( or Kingdom of Ligor ) ( ) was one of the major constituent city states ( mueang ) of the Siamese kingdoms of Sukhothai and later Ayutthaya and controlled a big part of the Malay peninsula.

The somewhat controversial Ramkhamhaeng stele of 1283 ( or 1292 ) lists Nakhon Si Thammarat as one of the tributary kingdoms of Sukhothai.

After the Pagan Empire's collapse in 1287, Myeik became part of successive Siamese kingdoms ( first Sukhothai, and later Ayutthaya ) from the late 13th century to the middle of 18th century ( except between 1564 and 1593 when the Burmese temporarily regained control ).

Both were cities within the former Sukhothai kingdom and of the same time period.

Its rulers, the Phukha dynasty, were related to the founders of Vientiane, however it became associated with the Sukhothai kingdom as it was easier to reach from the south than from the east or west.

In the Sukhothai era several city states ( Mueang ) subject to the king were located in the area of the modern province.

Sukhothai also produced a large quantity of glazed ceramics in the Sawankhalok style, which were traded throughout south-east Asia.

Sukhothai also produced a large quantity of glazed ceramics in the Sawankhalok style, which were traded throughout south-east Asia.

There were subsequent inscriptional references in Pagan, Burma dated to the 11th century CE and in Sukhothai, Thailand dated to the 14th century CE to South Indian, often Vaishnavite, courtiers who were tasked with defining the traditional calendar that began in mid-April.

There were subsequent inscriptional references in Pagan, Burma dated to the 11th century CE and in Sukhothai, Thailand dated to the 14th century CE to South Indian, often Vaishnavite, courtiers who were tasked with defining the traditional calendar that began in mid-April.

Of the three major efforts by Thai kings to establish an " authentic " canon for the icons, the Sukhothai style was the first, followed by the U Thong and the lion types.

The second major influence on Thai Buddhism is Hindu beliefs received from Cambodia, particularly during the Sukhothai period.

There followed a period of confusion in the succession, with six kings ruling in eleven years, which could have been disastrous if the northern powers had not fallen upon their own troubles, and Sukhothai to the south had not also been weakened.