This fort, historically known as White Town, was the first British fortress in India. Today, the Fort serves as the administrative headquarters for the legislative assembly of Tamil Nadu state. Identify this fort.

Fort St. George is the correct answer as it was the first British fortress built in India in 1644 in Madras (now Chennai), originally called White Town. It currently houses the Tamil Nadu Legislative Assembly and Secretariat, serving as the administrative headquarters of the state government. Vellore Fort is much older and built by Indian rulers, while Gingee Fort was built by the Chola dynasty.