Leadership
Ptolemy III Euergetes was responsible for the first known example of a series of decrees published as bilingual inscriptions on massive stone blocks in three writing systems. Ptolemy III's stone stela is the Canopus Stone of 238 BC. Other well-known examples are the Memphis Stele (Memphis Stone), bearing the Decree of Memphis, about 218 BC, passed by his son, Ptolemy IV, and the famous Rosetta Stone erected by Ptolemy Epiphanes, his grandson, in 196 BC.
Ptolemy III's stone contains decrees about priestly orders, and is a memorial for his daughter Berenice. But two of its 26 lines of hieroglyphs decree the use of a leap day added to the Egyptian calendar of 365 days, and the associated changes in festivals.
He is also credited with the foundation of the Serapeum.
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