Sol, the god of the sun, was worshipped all over the Empire, and he can be seen on coins as well as sculpture. This particular relief is unusual in its style: Sol is shown with large lips, a square nose and wide eyes, not at all normal for a Classical deity. The sculptor of this piece has mixed Celtic styles with a Classical subject.
This relief was re-used as a floor slab in the east granary in Corbridge in 1908.