The first known Western regional cults to Augustus were established with his permission around 19 BC in north-western ("Celtic") Spain and named "arae sestianae" after their military founder, L. Sestius Quirinalis Albinianus. Soon after, in either 12 BC or 10 BC, the first provincial imperial cult centre in the West was founded at Lugdunum by Drusus, as a focus for his new tripartite administrative division of Gallia Comata. Lugdunum set the type for official Western cult as a form of Roman-provincial identity, parceled into the establishment of military-administrative centres. These were strategically located within the unstable, "barbarian" Western provinces of the new Principate and inaugurated by military commanders who were – in all but one instance – members of the imperial family.