Plan of Trajan*s harbor. The animals are confinedto the area north of the monumentsmarked8, 9, 10. The most impressiveremainsvisibletoday, besidesthe hexagon, are number 10, a warehousebuilt by SeptimiusSeverus, and number52 , another Sevean warehousethat incorporatescolumnsfrom a porticuserectedby Claudius.