Apollonius (or Apollonios, Greek: Ἀπολλώνιος; 3rd century BC) was the dioiketes or chief finance minister of Egypt during the reign of Ptolemy II Philadelphus (r. 283–246 B.C.).
Little is known about his personal life; in ancient documents, he is called simply "Apollonius the dioiketes" without recording his home city or his father's name.
Apollonius's work for Ptolemy II Philadelphus was recorded in considerable detail by his private secretary, Zeno (or Zenon, Greek: Ζήνων).
In the course of his duties, Zeno made copious written records of various legal and financial transactions between citizens, as well as detailed descriptions of the construction of theatres, gymnasiums, palaces and baths of the new town of Philadelphia on the edge of Faiyum.
[6][7][8][9] During the winter of 1914-1915, a cache of over 2,000 papyrus documents was uncovered by Egyptian agricultural labourers who were digging for sebakh near Kôm el-Kharaba el-Kebir.