"Sun Worship, religious devotion paid to the sun either as a deity or as the symbol of a deity. Sun worship was practiced by the Iroquois, Plains, and Tsimshian peoples of North America and reached a high state of development among the Native Americans of Mexico and Peru. The sun was also a Hindu deity, regarded as maleficent by the Dravidians of southern India and as benevolent by the Munda of the central parts. The Babylonians were sun worshipers, and in ancient Persia worship of the sun was an integral part of the elaborate cult of Mithras. The ancient Egyptians worshiped the sun god Ra.
In ancient Greece the deities of the sun were Helios and Apollo. The worship of Helios was widespread; temples were built in Corinth, Árgos, Troezen (no longer in existence), and many other cities, but the principal seat was on the island of Rhodes, in the Dodecanese, where four white horses were sacrificed annually to the god. A similar sacrifice was offered on the summit of Mount Hagios Elias, in the Taïyetos Mountains, in Laconia. In time virtually all the functions of Helios were transferred to the god Apollo, in his identity as Phoebus. Sun worship persisted in Europe even after the introduction of Christianity, as is evidenced by its disguised survival in such traditional Christian practices as the Easter bonfire and the Yule log on Christmas"
Quoted with thanks from:
"Sun Worship." Microsoft® Encarta® 2006 [DVD]. Redmond, WA: Microsoft Corporation, 2005.