Important Achievements of Ptolemy III

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His building achievements:
Ptolemy III was interested in temples . He started the reconstruction of Edfu Temple which was dedicated to Horus phdty , namely the triad of Edfu: (Horus phdty , Hathor and Horus Sematawy) . The original temple of Edfu perhaps dates back to the Pre-Dynastic Period , but it was in complete ruins during the reign of Ptolemy III . He also rebuilt parts of the temple of god Khonsu at Karnak . He completed the work at Philae Temple which was started by his father , King Ptolemy II .
He built a gate to the south of Thebes . His most famous and important work is represented in his reorganization to the Egyptian calendar in which he added a quarter of a day to each year . He recorded this event on a stela to commemorate this deed and it is known as Canopus Decree . It was inscribed in Hieroglyphs , Demotic and Greek . Finally he decided to reorganize the administration of Egypt but this work was too much for him . He died in 221 BC after a reign of 25 years .