Constantine added new city walls, following a plan he claimed to have been given by Christ in a vision, and commissioned a grand central forum decorated with a triumphal column as well as several other monuments.
The new city walls made it safe from invasion.
mnli hypothesis: The new city walls made it safe from invasion. premise: Constantine added new city walls, following a plan he claimed to have been given by Christ in a vision, and commissioned a grand central forum decorated with a triumphal column as well as several other monuments.