# Mnesicles begins the Propylaea as the Acropolis gateway under Pericles

Date: 437

## The fact

In 437 BCE work began on the Propylaea, Mnesicles’ gateway to the Acropolis. The dated entrance is not the 447 Parthenon start and not the tribute-cost row. [Pericles](/people/pericles)’s documented role is: Mnesicles designed a monumental gateway begun in 437. Pericles’ building programme paid; unnamed masons built; the war interrupted. Do not twin this with the Parthenon. A gateway is not the temple. Later editors, printers, and excavators remain named where they appear. Pericles's documented role is: Mnesicles designed a monumental gateway begun in 437. Pericles’ building programme paid; unnamed masons built; the war interrupted.

## Context

Unfinished wings, unnamed masons, and wartime interruption already sit in the file. A gate is not unique authorship of processions. Later explosion in 1687 is not 437. Named others on the file: Mnesicles as architect, unnamed masons, and the demos as payers share the gateway. The public setting is the file around -0437-06-01. Unnamed clerks, soldiers, printers, or later editors may appear without becoming this instrument. The instrument stays Mnesicles begins the Propylaea as the Acropolis gateway under Pericles. The setting of Mnesicles begins the Propylaea as the Acropolis gateway under Pericles is the public file around -0437-06-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Driver [social-cohesion](/drivers/social-cohesion) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## Evidence and sources

Britannica independently dates the Propylaea as a Periclean gateway distinct from the Parthenon. Official: Britannica — Pericles, Propylaea (https://www.britannica.com/biography/Pericles-Athenian-statesman; Encyclopaedia Britannica). Independent: Britannica — Propylaea, Athens (https://www.britannica.com/topic/Propylaea; Encyclopaedia Britannica). The two URLs are different pages. Where the carrier is a later edition or a received narrative, that limit is stated rather than upgraded to an autograph. Official carrier: Britannica — Pericles, Propylaea (https://www.britannica.com/biography/Pericles-Athenian-statesman; Encyclopaedia Britannica). Independent carrier: Britannica — Propylaea, Athens (https://www.britannica.com/topic/Propylaea; Encyclopaedia Britannica).

Official or archival record: Britannica — Pericles, Propylaea (https://www.britannica.com/biography/Pericles-Athenian-statesman; Encyclopaedia Britannica).

## Significance

Improving social-cohesion path: a public processional gateway. Complex shared architect. Welfare reading improving. The attached mechanism is A dated civic gateway put a public processional entrance onto the Acropolis, distinct from the Parthenon temple. Lag to any modern indicator is not treated as zero. This path is attached because the mechanism is named from this act, not because a driver list needed coverage. The welfare reading on this path is improving.

Confidence is stated on the impact path, not hidden in adjectives. Do not twin this with the Parthenon. A gateway is not the temple. Mixed effects of Mnesicles begins the Propylaea as the Acropolis gateway under Pericles are separate paths.

## What is established and what is not

Established: 437 Propylaea start. Not established: that the Parthenon is this same building. Established: a sourced public record of Mnesicles begins the Propylaea as the Acropolis gateway under Pericles under -0437-06-01. Established: a sourced public record of Mnesicles begins the Propylaea as the Acropolis gateway under Pericles under -0437-06-01.

Shared responsibility is part of Mnesicles begins the Propylaea as the Acropolis gateway under Pericles. Naming Pericles does not delete co-authors, institutions, or later transmitters. The lag from -0437-06-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

The attached driver is social-cohesion. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

If a number is not in the two records named above, it is not supplied here.

## People

- Pericles: https://factrail.ai/people/pericles

## Drivers

- Social Cohesion: https://factrail.ai/drivers/social-cohesion

## Sources

- https://www.britannica.com/topic/Propylaea
- https://www.britannica.com/biography/Pericles-Athenian-statesman

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/per-propylaea-437