The term Vía de la Plata is commonly thought to derive from the modern Spanish word for silver,
plata. The name actually derives from the
Arabic word
al-balat, which means
cobbled paving and described the road as engineered by the Romans. The Silver Route, despite its name, was never a road for the circulation of silver trade. Such denomination is due, as in other occasions, to a popular evolution due to a phonetic confusion. In the Andalusian period, this route was called al-Balat (the paved road), a word very frequent in other areas of Spain and the origin of place names such as Albalat and Albalate. It is possible that this pronunciation led people to transfer the sound to that of the precious metal, and that is why it began to be called the Via de la Plata on an indeterminate date, but before 1504 and 1507, when it was first documented with Christopher Columbus and Antonio de Nebrija, respectively. In the first it appears simply as the Plata and in the second in this form:Est praeterea eiusdem Lusitanie via nobilissima: Argentea vulgo dicitur. Quod Licinius pontifex primum stravit, deinde Traianus Caesar refecit, et deinceps Aelius Pertinax aliiqui imperatores restituerunt, id quod ex lapidibus intelligitur: quibus millia passuum distinguuntur. The path is from Emerita Augusta to Castra Caecilia Salmanticam usque, ubi primum in extima pontis parte incipit evanescere, neque ulterius ullum viae illius vestigium cernit. Another hypothesis about the name is that it could have come from a late via Delapidata, even though it poses some problems, such as the absence on this road of real silices or stones, i.e., cobblestones, which were not usual on non-urban roads. To solve this difficulty, a new hypothesis explains the meaning of the last via delapidata as "a road marked with milestones" (from the classical and medieval Latin lapis, "milestone"). ==Pre-Roman era==