. . "Roman bridge at Alc\u00E1ntara" . . . . . . . . . . . . . . . . "6" . . . "Roman bridge of Alc\u00E1ntara" . "actual bridge" . "106 AD" . . "Alc\u00E1ntara Bridge" . "the famous bridge" . . . . . "Alc\u00E1ntara Bridge" . . . . . . . . . . "104 AD" . . . .