The Cathedral of the Blessed Virgin Mary is a Church of England cathedral in the city of Truro, Cornwall. It was built between 1880 and 1910 to a Gothic Revival design by John Loughborough Pearson on the site of the parish church of St Mary. It is one of only three cathedrals in the United Kingdom featuring three spires.

Truro is a cathedral city and civil parish in Cornwall, England, United Kingdom. It is Cornwall's county town, sole city and a centre for administration, leisure and retail trading. Its population was 18,766 in the 2011 census. People of Truro can be called Truronians. It grew as a trade centre through its port and as a stannary town for tin mining. It became mainland Britain's southernmost city in 1876, with the founding of the Diocese of Truro. It is home to Cornwall Council, the Royal Cornwall Museum, Truro Cathedral, the Hall for Cornwall and Cornwall's Courts of Justice.