each region of the empire produced terracottas in distinctive local styles, but all had rather similar ranges of subjects, above all the standard religious themes of gods, goddesses and their attributes; representations of birds and animals may often be linked with specific deities, though some animal figures may well have been made without any religious or ritual purpose. the religious subjects often include local traditions and cults: for example, the romano-egyptian repertoire of terracottas includes egyptian deities, such as harpocrates, the graeco-roman form of horus, while celtic gods appear amongst those made in the central gaulish industries, centred in the allier valley and the rhineland industry at cologne.