The Kings took refuge with the court of Lars Porsena, the king of neighboring Clusium; three yrs afterwards, they attempted to retake the town. They'd not organized to cope with the bridge and its defender, Horatius Cocles: 24. Could it be less expensive to make on the slab or piers? https://maps.app.goo.gl/31Ww58sUy2HnsAqy5