The art of the Sahara is diverse and still not well understood. Conventionally, the art is believed to broadly fit into one of four stylistic and chronological categories. The earliest of these, known as the Bubaline Period, comprises engravings only, and there are many images of wild animals and therianthropic (part-human, part-animal) figures. The three later periods—Bovidian, Caballine, and Camelline—include both paintings and engravings and are marked by the appearance of specific domestic animals in the art.
In spite of an initial breakthrough in the understanding of the symbolism of these images in terms of the beliefs and practices of specific extant Saharan peoples in 1966, little further work has been done in using this approach to investigate the meaning of the images. Many new discoveries have been made in recent years; scholars are hopeful that among these a clue to the meaning of some of the images will be found.