# Tetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name

Date: 150

## The fact

The 1940 Loeb Tetrabiblos (Robbins) prints a four-book astrological treatise as [Ptolemy](/people/ptolemy)’s. Judicial astrology as a public predictive office is an opacity-and-authority path: it sells necessity where measurement is not shown.

It is one event.

## Context

Split any later history-of-science access row. This stores the printed claim that heavenly geometry licenses earthly fate. Attribution of the Greek text to the Almagest author is the received scholarly position, not a papyrus autograph in this date field.

Ptolemy’s documented role is bounded by other offices and collaborators named in the sources below. Sharing a field with them is not a reason to drop a documented act, and it is not a reason to assign later consequences done in the name after death.

Conventional floruit is the mid-2nd century CE in Roman Alexandria.

Named person as heading of the dated public instrument. Later editors, museums, printers, or offices share publication. Complex where later carriers are the surviving public file.

## Evidence and sources

Loeb Classical Library — Ptolemy, Tetrabiblos and Perseus — Ptolemy, Tetrabiblos (Robbins) independently describe this instrument.

Official or archival record: Loeb Classical Library — Ptolemy, Tetrabiblos (https://www.hup.harvard.edu/books/9780674994799; [Harvard University](/organizations/harvard-university) Press).

## Significance

Printed natal astrology is an institutional-opacity path, not a 2nd-century court horoscope file.

## What is established and what is not

Established as a dated public record of this instrument.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

Established here: a sourced, dated public instrument with a named contribution by Ptolemy.

They are not a public rating.

Driver `institutional-corruption` is attached because the Significance sentence names a mechanism from Tetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name at 0150-06-01, not because a standing driver list needed coverage. Official page: https://www.hup.harvard.edu/books/9780674994799. Independent page: https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0168.

## People

- Ptolemy: https://factrail.ai/people/ptolemy

## Drivers

- Institutional Corruption: https://factrail.ai/drivers/institutional-corruption

## Sources

- https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0168
- https://www.hup.harvard.edu/books/9780674994799

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/pto-tetrabiblos-astrology