The Kailasanatha Temple, one of the earliest stone temples in South India, was built during the reign of Rajasimha (Narasimhavarman II) of the Pallava dynasty in the 8th century.

Chengalpattu district, which was separated from Kancheepuram in 2019, has shown the highest population growth rate due to rapid urbanization and industrial expansion.

The Alvar (Vaishnavite) and Nayanar (Shaivite) saints produced some of the earliest devotional Tamil poetry, laying the foundation for the Bhakti movement in South India.

Chengalpattu district, particularly the SIPCOT areas, has emerged as a major automobile and auto-component manufacturing hub in recent years.

Anna University, located in Chennai, consistently ranks within the top 20 engineering colleges in India according to the NIRF rankings, reflecting its academic excellence.

Narasimhavarman I (Mamalla) of the Pallava dynasty established naval supremacy and expanded Pallava influence across maritime routes in the Indian Ocean.

The Nattu (Nadu) was the smallest administrative unit in the Chola system, followed by Kottam and Mandalam.

Manikkavacakar, a Shaivite saint-poet of the 9th century, composed the Tiruvachakam, one of the most important Tamil devotional texts.

Lord Cornwallis established the Madras Civil Service as part of his administrative reforms during the late 18th century.

The Polygar Wars (1801-1805) were fought against the Polygars or Palayakkars, local military chiefs who resisted British expansion in Tamil Nadu.