The inscription is found on the front of the alter above a carved relief scene of several toga'ed men performing a ritual sacrifice. The inscription reads as follows:
Roughly translated into English, the inscription can be read as:
Although the altar was dedicated by a Roman, Vagdavercustis was most likely a native Germanic or Celtic goddess, who may have had a link with trees or woods. There is some evidence that Vagdavercustis was worshipped by the Batavians (a Germanic tribe reported by Tacitus to have lived around the Rhine delta, in the area that is currently the Netherlands) in the region between present-day Netherlands and Cologne (Köln). She may be related to Virtus, the Roman god of military virtue.