Erected in a.d. 21, it stands on a traffic island across the old N7, which here traces the route of the ancient Via Agrippa.
There was nothing built in a.d. 21 other than houses.
mnli hypothesis: There was nothing built in a.d. 21 other than houses. premise: Erected in a.d. 21, it stands on a traffic island across the old N7, which here traces the route of the ancient Via Agrippa.