Manzana de las Luces in Buenos Aires: History, Tunnels & Visits 2026

The intellectual and colonial heart of Buenos Aires. 18th-century buildings, historic courtyards, and the intrigue of underground tunnels steps from Plaza de Mayo.

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Manzana de las Luces in Buenos Aires: History, Tunnels & Visits 2026

The intellectual and colonial heart of Buenos Aires. 18th-century buildings, historic courtyards, and the intrigue of underground tunnels steps from Plaza de Mayo.

Historic courtyard and colonial architecture at the Manzana de las Luces complex, Buenos Aires.

Just two blocks from Plaza de Mayo lies the Manzana de las Luces (Illuminated Block), one of the oldest and most fascinating architectural and historic complexes in Buenos Aires. Bounded by Perú, Alsina, Moreno, and Bolívar streets, this colonial site served as the center of knowledge, education, and politics in Buenos Aires starting in the late 17th century.

In this guide, we cover its history, what to see within the complex, the mystery of its underground tunnels, and how to visit.

History: The Intellectual Center of Buenos Aires

The origin of the complex dates back to the arrival of the Jesuit Order in 1633. Following the expulsion of the Jesuits in 1767, the facilities came to house some of the most advanced institutions of the era.

Why is it called "Manzana de las Luces"? The name was coined in 1821 by the newspaper El Argos, referring to the "lights of Enlightenment and knowledge," as it housed the University of Buenos Aires (UBA), the Public Library, the Colegio Nacional de Buenos Aires, and the city's first printing press all in one block.
Key Events: Its halls housed the Representatives' Chamber of the Province of Buenos Aires and witnessed tragic historic events such as the "Night of the Long Batons" (La Noche de los Bastones Largos) in 1966.

What to See at Manzana de las Luces

1. Church of San Ignacio de Loyola

It is the oldest surviving church standing in the city (built between 1686 and 1722). Highlights include its Baroque façade, its original north tower, and its gilded colonial-era altarpieces.

2. Colonial Underground Tunnels

Built between the 17th and 18th centuries by the Jesuits, they form a hidden network beneath the historic center that connected churches, government buildings, and the port for defense and smuggling purposes.

Visitor Note: Access to tunnel sections may vary depending on active archaeological preservation and restoration work. It is essential to check the availability of specific guided tours in advance.

3. Colonial Courtyards & Procuraduría de las Misiones

Austere architectural spaces featuring stone and traditional brick walls where goods arriving from the Jesuit missions along the coast were once managed.

How to Get to Manzana de las Luces

Located at Perú 222 (between Alsina and Moreno), right in the heart of the Montserrat neighborhood / Historic Center.

By Subway (Subte):
- Line A: Plaza de Mayo or Perú station (walk 2 blocks).
- Line E: Bolívar station (just 100 meters away).
- Line D: Catedral station (walk 3 blocks).
By Bus (Colectivo): Lines 2, 7, 22, 24, 28, 29, 56, 64, 86, 103, 105, 126.
On Foot: It is a 3-minute walk from Plaza de Mayo, the Metropolitan Cathedral, and the Cabildo.

Frequently Asked Questions about Manzana de las Luces (FAQ)

Is admission to Manzana de las Luces free?

General entry to the site and its exhibitions is typically free (or accessible with a small voluntary contribution/ticket fee for guided tours).

Can you tour the tunnels on your own?

No, the underground tunnel network can only be visited through specialized guided tours with limited capacity to ensure the preservation of the archaeological heritage.

Why is it called "Manzana de las Luces"? The name was coined in 1821 by the newspaper El Argos, referring to the "lights of Enlightenment and knowledge," as it housed the University of Buenos Aires (UBA), the Public Library, the Colegio Nacional de Buenos Aires, and the city's first printing press all in one block.
Key Events: Its halls housed the Representatives' Chamber of the Province of Buenos Aires and witnessed tragic historic events such as the "Night of the Long Batons" (La Noche de los Bastones Largos) in 1966.

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