Apis. In ancient Egyptian religion, Apis or Hapis, alternatively spelled Hapi-ankh, was a sacred bull worshiped in the Memphis region, identified as the son of Hathor, a primary deity in the pantheon of Ancient Egypt. Initially, he was assigned a significant role in her worship, being sacrificed and reborn. Later, Apis also served as an intermediary between humans and other powerful deities. The Apis bull was an important sacred animal to the ancient Egyptians. As with the other sacred beasts Apis' importance increased over the centuries. During colonization of the conquered Egypt, Greek and Roman authors had much to say about Apis, the markings by which the black calf was recognized, the manner of his conception by a ray from heaven, his house at Memphis, the mode of prognostication from his actions, his death, the mourning at his death, his costly burial, and the rejoicings throughout the country when a new Apis was found. Auguste Mariette's excavation of the Serapeum of Saqqara revealed the tombs of more than sixty animals, ranging from the time of Amenhotep III to that of the Ptolemaic dynasty. Originally, each animal was buried in a separate tomb with a chapel built above it. Worship of an Apis bull, experienced by ancient Egyptians as holy, has been known since the First Dynasty in Memphis, while worship of the Apis as a proper god, at least according to Manetho's Aegyptiaca, seems to be a later adoption, purportedly started during the reign of king Kaiechos of the Second Dynasty. Apis is named on very early monuments, but little is known of the divine animal before the New Kingdom. Ceremonial burials of bulls indicate that ritual sacrifice was part of the worship of the early cow deities, Hathor and Bat, and a bull might represent her offspring, a king who became a deity after death. He was entitled the renewal of the life of the Memphite deity Ptah: but after death he became Osorapis, i.e. the Osiris Apis, just as dead humans were assimilated to Osiris, the ruler of the underworld. This Osorapis was identified with Serapis of the late Hellenistic period and may well be identical with him. Creating parallels to their own religious beliefs, ancient Greek writers identified Apis as an incarnation of Osiris, ignoring the connection with Ptah. Apis was the most popular of three great bull cults of ancient Egypt, the others being the cults of Mnevis and Buchis. All are related to the worship of Hathor or Bat, similar primary goddesses separated by region until unification that eventually merged as Hathor. The worship of Apis was continued by the Greeks and after them by the Romans, and lasted until almost 400 CE. This animal was chosen because it symbolized the courageous heart, great strength, and fighting spirit of the king. Apis came to being considered a manifestation of the king, as bulls were symbols of strength and fertility, qualities that are closely linked with kingship. Strong bull of his mother Hathor was a common title for Egyptian gods and male kings, being unused for women serving as king, such as Hatshepsut. As early as the time of the Narmer Palette, the king is depicted with a bovine tail on one side, and a bull is seen knocking down the walls of a city on the other. Occasionally, Apis was pictured with the sun-disk symbol of his mother, Hathor, between his horns, being one of few deities ever associated with her symbol. When the disk was depicted on his head with his horns below and the triangular marking on his forehead, an ankh was suggested. That symbol always was closely associated with Hathor.