Truro (trŏrˈō) [key], city (1991 pop. 16,130), W Cornwall, England, the administrative and commercial center of Cornwall, at the confluence of the Kenwyn and Allen rivers (which form the Truro River) and at head of Falmouth harbor. Historically a port, market town, and tin-mining center, it was the site of Cornwall's stannary courts (courts that oversaw the tin-mining industry); tourism is important to the modern economy. In 1876 Truro became cathedral city; the modern cathedral is in Early English style. The Royal Cornwall Museum is there.