Ara (small altar) dedicated to Mercurius with the epithet [C]ohortalis, word related with cohort, a subdivision of the legion. As

Mercury was not a god associated with the military world, but rather the patron of travel and commerce, it may be preferable to interpret this epithet in a civilian context, associated with warehouses and naval establishments of the imperial administration that existed in trading port cities, such as

Felicitas Iulia Olisipo. The monument's present state of conservation makes it hard to read and obtain any additional information, even about possible dedicants.