Short answers, pulled from the story.
The first known depictions of the Egyptian god Min appeared circa 3300 BC during the late Naqada II to early Naqada III periods. These monumental statues were discovered in an ancient temple at Koptos and range from 372 cm to 403 cm in height.
The sun god Ra became dominant during the Old Kingdom when his cult center at Heliopolis grew to become Egypt's most important religious site. By the Fifth Dynasty, Ra had developed close links with kingship and the afterlife that he retained for the rest of Egyptian history.
Pharaoh Akhenaten abolished official worship of other gods in favor of the sun-disk Aten during the New Kingdom. He moved Egypt's capital to a new city at Amarna and claimed unprecedented status where only he could worship the Aten while the populace directed worship toward him.
A major study by Jitse Dijkstra argues that organized paganism ended in the fifth century based on last inscriptional evidence of active pagan priesthood dating to the 450s. Some adherence to traditional religion seems to have survived into the sixth century based on a petition from Dioscorus of Aphrodito dated 567.
Sixth-century historian Procopius records temples closed down officially in AD 537 by local commander Narses the Persarmenian following an order of Byzantine emperor Justinian I. Ancient Egyptian religion is considered fully dead in the 530s after practices like mummification halted when Egyptians began converting to Christianity after Roman conquest in 30 BC.