Cluniaco for the Celtiberian tribe of the arévacos, Celtic voice perhaps coming from the Indo-European kolnis, hill, otero, hill ( collis). For the Romans Colonia Clunia Sulpicia, beautiful city refounded in the 1st century a. D. C. next to the Arandilla River a few kilometers from Aranda de Duero in Burgos next to the northern axis of the Hispanic roads that linked Astúrica Augusta with Caesar Augusta and Tarraco. The alba de Castro site bears witness to the existence of a city that may have had about 100. 000 inhabitants with forum, theater and public baths.
