Elephants have been depicted in mythology, symbolism and popular culture. They are both revered in religion and respected for their prowess in war. They also have negative connotations such as being a symbol for an unnecessary burden. Ever since the Stone Age, when elephants were represented by ancient petroglyphs and cave art, they have been portrayed in various forms of art, including pictures, sculptures, music, film, and even architecture. In Hindu iconography, many devas are associated with a mount or vehicle known as a v?hana. In addition to providing a means of transport, they symbolically represent a divine attribute. The elephant v?hana represents wisdom, divine knowledge and royal power; it is associated with Lakshmi, Brihaspati, Shachi and Indra. Indra was said to ride on a flying elephant named Airavata, who was made the King of all elephants by Lord Indra. It is often considered sacred and symbolises royalty in Thailand and Burma, where it is also considered a symbol of good luck. In Buddhist iconography, the elephant is associated with Queen M?y? of Sakya, the mother of Gautama Buddha. She had a vivid dream foretelling her pregnancy in which a white elephant featured prominently. Elephants remain an integral part of religion in South Asia and some are even featured in various religious practices. Temple elephants are specially trained captive elephants that are lavishly caparisoned and used in various temple activities. Among the most famous of the temple elephants is Guruvayur Keshavan of Kerala, India. They are also used in festivals in Sri Lanka such as the Esala Perahera. In the version of the Chinese zodiac used in Northern Thailand, the last year in the 12-year cycle called "Year of the Pig" in China is known instead as "Year of the Elephant", reflecting the importance of elephants in Thai culture.