Observance guideSource-backed

Founding anniversary of Asunción2026 · Date · History · Messages

Paraguay’s Chamber of Deputies and the Municipality of Asunción mark 15 August as the city’s founding anniversary and identify 1537 as the founding year.

Annual dateReviewed 2026-09-08Sensitive topic

About Founding anniversary of Asunción

Asunción, Paraguay, marks its city-founding anniversary on 15 August.

The Municipality of Asunción identifies 15 August 1537 as the date when Juan de Salazar y Espinosa established the fort that gave rise to the city.

Why Founding anniversary of Asunción matters

The anniversary is a municipal civic and cultural commemoration of Asunción’s founding history.

The 1537 event explains the date, but it should not be mistaken for evidence that a recurring annual anniversary observance was formally established in that same year.

History of Founding anniversary of Asunción

Municipal historical material dates the construction of the fort associated with Asunción’s founding to 15 August 1537.

The municipality’s 2024 program celebrated the city’s 487th anniversary on 15 August.

On 15 August 2026, the municipality marked Asunción’s 489th founding anniversary with civic, cultural and public events.

Origins & establishment

What the evidence establishes

Evidence & sources ↓

Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.

Current facilitator / coordinatorMunicipality of AsunciónThe municipality publishes and organizes official civic and cultural events for the city’s founding anniversary.

Why this exact date?15 August marks the establishment of the fort that gave rise to Asunción on 15 August 1537.Municipal historical and anniversary sources directly identify 15 August 1537 as the founding date.

7 fields not established in reviewed sources

Originator / proposerJuan de Salazar y Espinosa is documented as a founder of the city, not as the originator of the recurring anniversary observance.

Proclaiming / establishing bodyThe reviewed municipal sources do not identify the body that formally established the recurring anniversary observance.

Original establishing instrument / decisionNo observance-establishing legal instrument is established in the reviewed sources.

Original instrument adoption / decision dateNo observance instrument adoption date is established.

First observanceThe reviewed sources document modern recurring commemorations but do not identify the first annual anniversary observance.

Former nameNo former formal name is established.

Former dateNo former recurring date is established.

Source qualityHigh confidence

3 Primary institutional / legal

View all sources ↓

Names

Also known as

Founding of Asuncion in Paraguay

How to Observe Founding anniversary of Asunción

Use municipal history for the 1537 foundation date and municipal event pages for current anniversary programming.

Keep Juan de Salazar y Espinosa’s role as a city-founder fact separate from the unknown originator of the recurring anniversary observance.

Describe current celebrations as municipal/civic rather than inferring a nationwide public-holiday status.

Do not invent a first recurring anniversary date from the 1537 founding event.

Founding anniversary of Asunción Facts

Fact 01

Asunción’s founding anniversary is marked on 15 August.

Fact 02

The municipality dates the city’s foundational fort to 15 August 1537.

Fact 03

Juan de Salazar y Espinosa is identified in municipal history with establishing the fort that gave rise to the city.

Fact 04

Municipal authorities continue to organize anniversary events around August 15.

Fact 05

The reviewed sources do not establish the first recurring municipal anniversary observance or a formal founding instrument for the celebration.

Founding anniversary of Asunción Messages

Happy anniversary to Asunción, with recognition of the city’s long history and the communities that continue to shape it.

May Asunción’s anniversary bring together history, culture and civic life across the city.

Classification

Topic and context

Civic, Remembrance & History →

Civic, Remembrance & History Civic Public Life

Accuracy notes

What this page does not assume

Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
Do not treat the title alone as proof of government recognition or public-holiday status.
Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Remembrance Civic Context Care.

Evidence

Evidence & sources

Source policy →

Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.

Source 01www.asuncion.gov.py

Municipality of Asunción — 487th anniversary, 15 August 2024 (opens in a new tab)

Primary institutional / legalGuide sources

Source 02www.asuncion.gov.py

Municipality of Asunción — 489th anniversary events (opens in a new tab)

Observance recordPrimary institutional / legalGuide sources

Official Municipal Government

Source 03www.asuncion.gov.py

Municipality of Asunción — Calle 15 de Agosto / city foundation history (opens in a new tab)

Primary institutional / legalGuide sources

Source 04www.diputados.gov.py

Paraguay Chamber of Deputies — Asunción anniversary 2026 (opens in a new tab)

Observance record

Official Legislature

Questions & connections

Understand it, compare it, then explore further

Start with the most common factual questions, then compare closely related observances and explore useful connections.

Reader questions

Frequently asked questions

When is Founding anniversary of Asunción?

15 August; Asunción was founded 15 August 1537 The documented recurrence rule is: 15 August; Asunción was founded 15 August 1537.

Does Founding anniversary of Asunción fall on the same date every year?

Yes. It uses a fixed annual date unless stronger evidence changes the pattern.

Is Founding anniversary of Asunción an official public holiday?

The reviewed sources verify it within this scope: Asunción, Paraguay / municipal founding anniversary. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.

Who established or recognizes Founding anniversary of Asunción?

The documented basis is: Paraguay’s Chamber of Deputies and the Municipality of Asunción mark 15 August as the city’s founding anniversary and identify 1537 as the founding year.. Supporting evidence includes Paraguay Chamber of Deputies — Asunción anniversary 2026. The site does not infer a separate creator or founder unless reviewed evidence establishes one.

Is Founding anniversary of Asunción international or country-specific?

This observance is specific to Paraguay. Its fuller verified scope is: Asunción, Paraguay / municipal founding anniversary.

How is this page verified?

The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-09-08.

When is Asunción’s founding anniversary?

The city marks it on 15 August.

What happened on August 15, 1537?

Municipal history states that Juan de Salazar y Espinosa established the fort that gave rise to Asunción on that date.

Does the 1537 founding date prove the anniversary observance began then?

No. It establishes the historical event behind the date, not the first recurring anniversary celebration.

Same date