oscarps
To point on which there is no agreement among historians of the city is the date of destruction of the old bridge and the causes of it. Some authors mention the tenth century as an end, as well as a deliberate destruction by the Astur leaders in order to avoid attacks by Muslim troops from the southern kingdoms (see: Battle of Alhandic and Zamora Day). 5 other causes supported by other authors focus on natural catastrophes such as the usual floods of the river Duero.
