Tanjore District (Madras Presidency) in the context of Pudukkottai District

Mannargudi (Tamil pronunciation: [mannaːrgɯɖi]) is a Municipality in Thiruvarur district in the Indian state of Tamil Nadu. It is the headquarters of the Mannargudi taluk. The town is located at a distance of 28 km (17 mi) from the district headquarters Thiruvarur, 12 km from Needamangalam, 36 km from Kumbakonam, 40 km from Thanjavur, and 310 km (190 mi) from the state capital Chennai. Mannargudi is known for the Rajagopalaswamy temple, a prominent Vaishnavite shrine.

Mannargudi was founded as an agraharam village by the Medieval Cholas during the 7th century A.D. The town was subsequently ruled by various dynasties including the Chola king Rajadhiraja Chola (1018–1054 CE), Vijayanagar Empire, Delhi Sultanate, Thanjavur Nayaks, Thanjavur Marathas and the British Empire. Mannargudi was a part of the erstwhile Tanjore district until India's independence in 1947 and Thanjavur district until 1991. It subsequently became a part of the newly formed Tiruvarur district. The town is known for agriculture, metal working and weaving. The region around Mannargudi has considerable mineral deposits.

Needamangalam or Nidamangalam, is a town panchayat in Thiruvarur district in the Cauvery Delta of the Indian state of Tamil Nadu. Needamangalam was originally part of the composite Tanjore Dist during the British Raj period until 1997. In the 18th and 19th century, it was also called Yamunambalpuram. Needamangalam is the headquarters of the Needamangalam Taluk. The town is located 30 km east of Thanjavur, 80 km east of Tiruchirappalli and 318 km south of Chennai. Needamangalam is a junction for two busy highways, National Highway 67 and State Highway SH 66.

Chola Nadu also known as Chola Mandalam,is an ancient region spanning on the current state of Tamil Nadu and union territory of Puducherry in southern India. It encompasses the lower reaches of the Kaveri River and its delta, and formed the cultural homeland and political base of the Chola Dynasty which ruled large parts of India and Sri Lanka between the 9th and 13th centuries CE. Uraiyur (now part of Tiruchirapalli city) served as the early Chola capital, then medieval Cholas shifted to Thanjavur and later cholas king Rajendra Chola I moved the capital to Gangaikonda Cholapuram in Ariyalur district in the 11th century CE. Chola Nadu is therefore larger than the Tanjore region or the Cauvery delta in the strict sense. Although it essentially corresponds to these two overlapping areas.

The boundaries of the region roughly correlates with those of the British India districts of Tanjore and Trichinopoly, and the établissement of Karaikal in French India. Historically, the region also encompassed at time present Ariyalur and Perambalur districts (parts of erstwhile South Arcot), parts of Pudukkottai district (erstwhile Pudukkottai State) and southern reaches of Cuddalore district (taluks of Chidambaram and Kattumannarkoil).