Truro Cathedral is the cathedral of the Church of England Diocese of Truro in the city of Truro, Cornwall, in the United Kingdom. The Bishop of the diocese is Timothy Martin Thornton. It is one of the three cathedrals in the United Kingdom to have three spires, the other two are Lichfield Cathedral and St Mary's Cathedral in Edinburgh. The architect of the cathedral was John Loughborough Pearson and it was built in the Gothic Revival style, 1880-1910. The south aisle of the cathedral was part of the medieval parish church of St Mary.