Ptolemy III (10 May 98 AD- 28 April 154 AD) was the ninth member of the Argead-Ptolemaic dynasty of Diadochia. He was the son of Adrianus I, and after the death of his father, he succeeded to the throne at the age of thirty-five and ruled until his death. Ptolemy III was known for rebuilding the Pantheon, was a humanist, and regarded among the best men to ever rule Diadochia.