The present building dates from 1511 and the tower is older. What is very singular, and accounts for the choice of subjects on its quaintly carven walls, is that they were not designed for a sacred building at all. They were done for Henry Ashe of Trecarell, a wealthy Cornishman who had a great mansion and was rebuilding it regardless of cost; but in the midst of the work his only son, a child, was drowned and the mother died almost immediately from the shock, so the wretched father passed on the granite carvings, designed for a gateway to his mansion, to the church, where they now attract many curious visitors and adorn, not only the walls but the very fine projecting south porch. The rose, the pomegranate, the Prince of Wales's feathers are frequently repeated with the arms of Trecarell and Ashe. In order to give it an ecclesiastical finish certain sentences in Latin such as "Oh how terrible and fearful is this place. Surely this is none other but the house of God and the gate of heaven!" are embossed on shields round the base.
A much more ancient church is that of St. Stephen away on the opposite heights beyond the valley. Some authorities think that the name Launceston really means Llan Stephan, the church of St. Stephen, and there is some colour for this, as it is possible the original town was around the older church and that the other grew up near to the castle. Baring-Gould boldly claims that the present town has no right to the name at all, but should be called Dunheved meaning "Swelling Hill." The castle keep certainly stands on a most appropriate swelling hill, just the place for such a fortification, with a magnificent view over miles of country.
The present remains, the great keep with its rings of stone, is of Norman origin, but there was most certainly a Saxon castle here before it. It stands in delightful grounds, freely open to all, and a very sanctuary for birds. A winding stair runs within the wall and even in the present roofless condition it needs but little imagination to transport oneself back into feudal times, when the womenfolk cowered within the small rooms behind the solid masonry, and the warriors guarded the loopholes, watching, waiting for attack.