Leite de Vasconcelos mentions that the site was used by the inhabitants of the Roman empire from all walks of life. Several inscriptions suggest that the temple of Endovelicus was used as an oracle. One of the inscriptions states: EX IMPERATO AVERNO. Leite de Vasconcelos translated this as “"segundo a determinação que emanou de baixo"" (by the determination that emanated from below) suggesting that there is a similarity to the Temple of Apollo at Delphi. Steam would emanate from below, deep within the earth, and bestow clairvoyance. Vasconcelos also suggests that believers practiced the "incubatio", sleeping at the site, hoping for dreams they could interpret later.