Jupiter

In Roman mythology, the supreme god reigning on Mount Olympus, identified with the Greek Zeus; son of Saturn and Ops; and husband of Juno, his sister. His titles included Fulgur (thrower of lightning), Tonans (maker of thunder), Invictus (protector in battle), and Triumphator (bestower of victory). His main temple was on the Capitoline Hill in Rome; destination of the solemn triumphal processions of victorious generals. As the particular protector of Rome, he was honoured by consuls taking office.

Jupiter determined the course of human affairs, foreseeing the results of his will, and revealing the future to mortals through signs and the flight of birds. In this capacity he was invoked at the start of an enterprise, together with Janus, god of beginnings. He was also regarded as guardian of the law, and protector of justice and virtue. White was sacred to him: white animals were sacrificed to him, his chariot was drawn by four white horses, his priests, the flamen, wore white caps, and the consuls of Rome dressed in white at their inauguration.