Bacax is a native Berber deity of caves and vegetation whose cult is unusually well documented by epigraphy. His sanctuary was the Ghar el Djemaa, a large cavern in Djebel Taya above the Roman town of Thibilis (Announa, Algeria). Each spring the two annually elected magistri of Thibilis made a pilgrimage to the grotto and engraved a dated dedication to 'Bacax Augustus'; the surviving series runs from roughly 210 to 284 CE, with celebrations falling around 31 March or 1 May, tied to the growth season of cereals and pasture. Although the Latinized name resembles Bacchus, scholars regard the god as thoroughly indigenous, a local numen of the sacred mountain and its life-renewing spring.