His extant work, Eisagogika, or Introductory Matters (or Introduction), which was written in 378 AD, is a treatment of major topics in astrology as practiced in the fourth century Roman Empire.
We know he was regarded as a considerable authority because we have the record of a series of lectures given on his work by the respected Neo-Platonist philosopher Olympiodorus some two centuries later (in 564 AD), in Alexandria.
Paulus also discusses dodekatemoria and monomoiria, and gives an extensive treatment of sect in astrological analysis, and of the influence of planetary aspects as they apply and separate (the Hellenistic understanding of which is considerably at odds with modern practice.)
Forty years earlier, Julius Firmicus Maternus had written Mathesis, a long and very detailed summary of the astrological technique of his time, which has come down to us intact.
[5] However, this notion has been rejected by other scholars in the field, notably by David Pingree who stated that "...the identification of Paulus Alexandrinus with the author of the Paulisasiddhanta is totally false".