On 22 August 1639, Francis Day of the British East India Company bought a small strip of land on the Coromandel Coast. The region was ruled by Damarla Venkatadri Nayakudu,, the Nayaka of Vandavasi He granted the British permission to build a factory and warehouse for their trading enterprises. A year later, the British built Fort St George, which became the nucleus of the growing colonial city. Fort St. George housed the Tamil Nadu Assembly until the new Secretariat building was opened in 2010.In 1746, Fort St. George and Madras were captured by the French under General La Bourdonnais, the Governor of Mauritius, who plundered the town and its outlying villages. The British regained control in 1749 through the Treaty of Aix-la-Chapelle and fortified the town's fortress wall to withstand further attacks from the French and another looming threat, Hyder Ali, theSultan of Mysore. By the late 18th century, the British had conquered most of the region around Tamil Nadu and the northern modern-day states of Andhra Pradesh and Karnataka, establishing the Madras Presidency with Madras as the capital. Under British rule, the city grew into a major urban centre and naval base.