Lisbon underground: the secret Roman galleries are revealed twice a year

The only way into the Lisbon underground Roman galleries is through this hole in the ground at Rua da Conceição

About twenty years ago, as I was walking aimlessly through the streets of downtown Lisbon, I had a chance encounter with a hole in the ground, in the middle of the street at Rua da Conceição. It was my first visit to the capital and I thought that, for sure, it was destiny opening up a street of Lisbon to a rarely seen attraction. I had been given the rare opportunity to visit Lisbon underground and the secret Roman galleries under Baixa.

Today I know it happens regularly twice a year (I just happened to be here and passing by at the exact right time). Back then there was no such thing as Social Media and the queues were smaller. No way I had to wait for (almost) five hours in line to go underground.

A passage between two Roman galleries underground Lisbon

Most of the passages between the Roman galleries are narrow and low

EDIT: Changes have been made to how you can visit this attraction. Since April 2016, the City Council charges a €1.00 fee per person (approximately USD $1.15) and you must book your visit in advance here.

What will you find underground Lisbon?

As we waited (patiently) in line and as we approached the entrance (it still is a hole in the ground on Rua da Conceição…), people were coming out showing mixed feelings. However their experience had been like, they still had an amazing sense of humor and were coming up as if they had just been rescued from falling down a well.

In 1771, while rebuilding the city after the great earthquake in 1755, they found what seemed to be a foundation-like structure that could be traced back to the Roman Empire era, estimated to be from the first half of the 1st Century AD.

Once they started building the sewage system in the 18th Century, the access to the whole monument was limited but you can still see the robust structure that, literally, holds part of the Baixa Pombalina up and that, when it was built by the Romans, was meant to level the ground and make it stable enough to hold their constructions.

A crack on the ground that dates back to the 1755 Great Earthquake

A crack on the ground that dates back to the 1755 Great Earthquake

Why should you book a visit to these Lisbon Roman galleries?

If you like once in a lifetime findings, this is one of them. I confess that seeing it once is more than enough and not much has changed — it’s wet and damp, and in most places, you have to mind your head and duck down as much as you can. What would have changed anyway?

The affordable entry fee makes you think “why not, as long as we’re here?”. And the knowledge that it only opens twice a year for one weekend helps to build up the mysticism around it. As we were waiting in line, many tourists who were passing by approached me asking “what’s down there that people queue to see??”. I did my best to explain the historical importance of it; some of them were curious to come back the next day, some of them were not.

The Lisbon underground Roman galleries' guide ducks to move from one gallery to the next

There are sections of the Lisbon underground Roman galleries where you can’t stand up straight

I wondered if it’s still worth the trouble to have groups of 25 people each to go down there for 20 minutes guided tours. The dedication of the volunteers to this is, however, inspiring — they don’t get paid to do it, they willingly give up on their free time once a year, and they are willing to share their knowledge. They enjoy talking about its History, its function and how it still endures after all this time.

Any other day these ruins are flooded with the nearby river waters — you can still see the openings (now closed by the pavement) that people used to fill buckets and use the water for cooking and cleaning; after the construction of the sewage system the water was of course no longer safe to drink and the holes were closed.

For us to be able to see this piece of History, there is a collective effort going on: the police reroute traffic (except for the famous tram 28), the fire department pumps the water out a few days in advance and, of course, the volunteers who guide us, in particular, our guide Catarina who briefly (yet passionately) told us the History of the place.

A group of tourists paying attention to the guide as she explains the History of Lisbon underground Roman galleries

Address: Rua da Conceição 77
info@museudelisboa.pt
To know when the Roman galleries will open next, follow Museu de Lisboa on Facebook

Have you visited these Lisbon underground Roman galleries?

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