Here is an interesting article : A coin found in its basement allows to reconsider the building date of Segovia's famous acqueduct http://elpais.com/elpais/2016/11/01/inenglish/1477997248_304960.html Q
Interesting indeed, thanks! For some reason the English translation does not say much about the coin while the Spanish original mentions a sestertius ("se halló un sestercio de Trajano emitido entre 112 y 116, durante el sexto consulado del emperor.") ... no image though. Christian