Which is the most southerly city in mainland Great Britain?

Truro is a city and civil parish in Cornwall, England. It is Cornwall's county town and only city and centre for administration, leisure and retail. Truro's population was recorded as 18,766 in the 2011 census. People from Truro are known as Truronians. As the southernmost city in mainland Britain, Truro grew as a centre of trade from its port and then as a stannary town for the tin mining industry. Its cathedral was completed in 1910. Places of interest include the Royal Cornwall Museum, Truro Cathedral the Hall for Cornwall and Cornwall's Courts of Justice.

The earliest records and archaeological findings of a permanent settlement in the Truro area date from Norman times. A castle was built there in the 12th century by Richard de Luci, Chief Justice of England in the reign of Henry II, who for his services to the court was granted land in Cornwall, including the area surrounding the confluence of the two rivers. The town grew in the shadow of the castle and was awarded borough status to further economic activity. The castle has long since disappeared.