# Trajan’s hexagonal harbour at Portus is completed as a grain-and-trade basin

Date: 113

## The fact

Ostia and Portus public research pages print the hexagonal basin as a Trajanic harbour work.

It is one event.

## Context

He did not pour 2000 concrete. Archaeologists publish the basin.

Trajan Shared work with other named actors remains in the record.

[Trajan](/people/trajan)’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 reign is 98–117 CE. Dated public instruments here are later inscriptions as published, Pliny as Loeb/Perseus, Dio as LacusCurtius, and museum or UNESCO pages.

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

Ostia Antica — harbour city research pages and Britannica — Trajan independently describe this instrument.

Official or archival record: Ostia Antica — harbour city research pages (https://www.ostia-antica.org/; Ostia Antica project).

## Significance

A published hexagon is not a 113 CE bill of lading.

## 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 Trajan.

They are not a public rating.

Trajan did not file a later UNESCO form, a later Loeb colophon, or a later museum label as a personal act. A portrait or conventional bust is not this mechanism. Allegation, reconstruction, and established occurrence stay distinct. Official page: https://www.ostia-antica.org/. Independent page: https://www.britannica.com/biography/Trajan.

## People

- Trajan: https://factrail.ai/people/trajan

## Drivers

- Energy Security: https://factrail.ai/drivers/energy-security

## Sources

- https://www.ostia-antica.org/
- https://www.britannica.com/biography/Trajan

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/trj-ostia-portus