Ang Thong (Thai: อ่างทอง, pronounced [ʔàːŋ tʰɔ̄ːŋ]) or Angthong is one of the central provinces (changwat) of Thailand. The name "Ang Thong" means 'gold basin', thought to have derived from the basin-like geography of the area, and the golden color of the rice grown in the region.
Neighboring provinces are (from north clockwise) Sing Buri, Lopburi, Ayutthaya, and Suphan Buri.
Lopburi (Thai: ลพบุรี, RTGS: Lop Buri, pronounced [lóp bū.rīː]) is a province in the central region of Thailand. The province is divided into 11 administrative districts, and Mueang Lopburi district is the capital. With over 720,000 people, the province is Thailand's 31st largest area and 35th most populous. There are eight neighboring provinces, Phetchabun, Chaiyaphum, Nakhon Ratchasima, Saraburi, Phra Nakhon Si Ayutthaya, Ang Thong, Sing Buri, and Nakhon Sawan.
Lopburi is a significant province historically, where many historical structures, artifacts, and prehistoric settlements have been discovered. In the past, Lopburi was called by the name Lavo.The kingdom had been ruled by an absolute monarch.
Suphan Buri (Thai: สุพรรณบุรี, pronounced [sù.pʰān būrīː]), located in the central region of Thailand, is one of the country's 76 provinces (จังหวัด, changwat), its first-level administrative divisions. Suphan Buri's neighbouring provinces are (from north clockwise) Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Nakhon Pathom and Kanchanaburi. In 2018, the province had a population of around 848,700, making up about 1.28% of the Thailand's total.
Suphan Buri Province has a moderately diverse ethnic population, the majority of which are of Tai, Mon, Lao, Chinese, and Khmer descent.
Phra Nakhon Si Ayutthaya, or locally and simply Ayutthaya (historically Iudea, Iudiad, Iudia, Juthia or Judia), is one of the central provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise) Ang Thong, Lopburi, Saraburi, Pathum Thani, Nonthaburi, Nakhon Pathom and Suphan Buri.
Sing Buri (Thai: สิงห์บุรี, pronounced [sǐŋ būrīː]) is one of the central provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise) Nakhon Sawan, Lopburi, Ang Thong, Suphan Buri, and Chai Nat.
According to the Ayutthaya Testimonies, the province center, Sing Buri, was founded by the Siamese monarch Anuraja in the early 12th century, who established it as the new capital of the Phraek Si Racha region, thereby superseding Chai Nat as the administrative center of the polity.