In Greek Mythology Helios was the first Greek sun god, and preceded Apollo.  However, to ancient Greeks Apollo later became the accepted sun god.

Helios was the the son of the Titans Hyperion and Theia, his brother was Aurora.  Helios was believed to live in a glorious palace in the east.  He was said to arise from his splendid Palace in the morning and drive his chariot through the sky, only to return by a winged golden boat in the evening.

Although the god Apollo overshadowed Helios, he was worshiped in many places in the ancient Hellenic world.  Famous cities where temples to the ancient Greek god had been built included Argos, Corinth, and Rhodes among others.