The two half-relief figures of wolves above the gateway are the only remainders of this edifice. The right-hand wall runs steeply up toward the Naamestraat to a ruin that is accesible via an outside staircase. The gateway appears to be an archway, but it was probably a wall tower in which a passageway to the outside was later added. According to the history writer Edward Van Even, the figures of the wolves may be remainders of a Viking altar.*
*From Out and About in Leuven walks leaflet
an interesting find, CP.
I missed the first time I passed by it