A fascinating temple near Carrawburgh fort, dedicated to the god beloved by Roman soldiers. It was the largest of such buildings to occupy the site and, like many Mithraic temples, it was situated near a military base. Founded in the 3rd century, it was eventually desecrated, probably by Christians. Nearby was the still more popular well shrine of the water-nymph Coventina.

3.75 miles west of Chollerford, on B6318
1 mile North-East of Greenhead on B6318