and how long did it last?
Ruling for nearly three centuries, the Ptolemies were the longest and final dynasty in ancient Egyptian history. It lasted until the death of Cleopatra in 30 BC.
Ptolemaic Kingdom
lasted until the death of Cleopatra in 30 BC. Ruling for nearly three centuries, the Ptolemies were the longest and final dynasty in ancient Egyptian history. 
map of tombs in valley of the kings In 1799, members of Napoleon's expedition to Egypt (especially Vivant Denon) drew maps and plans of the known tombs, and for the first time noted the Western Valley who were these tombs built for? For the pharaohs and powerful nobles of the New Kingdom can you name some of the artefacts found inside these tombs? The royal tombs are decorated with scenes from Egyptian mythology and give clues as to the beliefs and funerary practices of the period. Almost all of the tombs seem to have been opened and robbed in antiquity, but they still give an idea of the opulence and power of the pharaohs. can you name some deities who feature in the mythology you just mentioned? Ra,  Osiris, Isis, Horus,  Set. do they appear in textual sources from that era? Yes,  "Teaching for King Merykara", "Tale of the Two Brothers", "The Blinding of Truth by Falsehood" when was the first one composed? UNANSWERABLE what is the first deity you mentioned above a god of? Ra is the ancient Egyptian deity of the sun portrayed as a falcon and shared characteristics with the sky god Horus. where was he primarily worshipped? The chief cultic center of Ra was "Iunu" "the Place of Pillars", later known to the Ptolemaic Kingdom as Heliopolis (,  "Sun City") and today located in the suburbs of Cairo. is the pillar you are talking about still standing? UNANSWERABLE who founded the kingdom you just mentioned? Ptolemy I Soter, a companion of Alexander the Great
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Ptolemaic Kingdom [SEP] Introduction
The Ptolemaic Kingdom (; ) was an ancient Hellenistic state based in Egypt. It was founded in 305 BC by Ptolemy I Soter, a companion of Alexander the Great, and lasted until the death of Cleopatra in 30 BC. Ruling for nearly three centuries, the Ptolemies were the longest and final dynasty in ancient Egyptian history. Alexander the Great conquered Persian-controlled Egypt in 332 BC during his campaigns against the Achaemenid Empire. After Alexander's death in 323 BC, his empire quickly unraveled amid competing claims by the "diadochi", his closest friends and companions. Ptolemy, a Macedonian Greek who was one of Alexander's most trusted generals and confidants, won control of Egypt from his rivals and declared himself pharaoh.