Romano-Celtic temple purpose within the ritual environment of the temple. The temple at Woodeaton produced evidence for multiple hearths within the temple superstructure, suggesting the use of fire within the religious worship at that site. A priest would perform religious ceremonies within the temple or outside in the enclosure, although the exact daily role they played in Romano-Celtic temples is not well understood. Performing sacrifice, prayers, and overseeing festivals are key features of priesthoods in the Roman Empire. In Aquae Sulis (modern Bath, England), an altar was dedicated by a "haruspex"; this religious position may have been utilised elsewhere in Britannia. Fragments
Christianity in Roman Britain introduced Roman counterparts were venerated in the region, sometimes syncretising together, as in cases like Apollo-Cunomaglus and Sulis-Minerva. Romano-British temples were sometimes erected at locations that had earlier been cultic sites in the pre-Roman Iron Age. A new style of "Romano-Celtic temple" developed which was influenced by both Iron Age and imperial Roman architectural styles but also unique from both; buildings in this style remained in use until the fourth century. The cults of various eastern deities had also been introduced to Roman Britain, among them those of the deities Isis, Mithras, and Cybele; Christianity was just one of these