It is in the center of a street in downtown Lisbon that there is a rare underground space that opens to the public only at specific times of the year, attracting hundreds of visitors. These are the Roman Galleries of Rua da Prata, an archaeological site over 2 thousand years old that, in 2026, will not be accessible in April, as is usual.
According to the portal, the change is related to the need to improve visiting conditions. The decision implies a change in the usual calendar, surprising those who were waiting for the reopening at this time of year.
Access to the galleries is far from regular. According to the same source, this underground space only opens to the public at very specific times, normally twice a year. The limitation is due to the natural conditions of the location. It mentions the same source that the interior remains, most of the time, with a water level that can reach around one meter high, making frequent visits unfeasible.
Rare and demanding process
To allow visitors to enter, it is necessary to prepare the space in advance. The website writes that, before each opening, the water accumulated inside is completely drained.
This process conditions the number of occasions on which the galleries can be visited. According to the same source, it is precisely this operation that allows the location to be temporarily transformed into a space accessible to the public.
The decision not to open in April is related to improvements in the visitor experience. The objective is to guarantee better conditions for the hundreds of people who usually seek out this space. “The reason makes a lot of sense: to offer hundreds of visitors better visiting conditions”, says the publication, justifying the postponement of the usual opening.
A “treasure” hidden in the city
The Roman Galleries are often described as one of Lisbon’s best kept secrets. According to the same source, they are underground structures that remain invisible for much of the year. Lisbon “still holds underground secrets like this, a true treasure”, writes the website, highlighting the historical interest and unusual nature of the visit.
The discovery of this space dates back to the 18th century. The same source mentions that, later, at the beginning of the 20th century, the galleries were used as water preserves in the Rua da Prata area. The set corresponds to a cryptoporticus, a structure built to support buildings on the surface. This type of construction was common in urban areas with strong activity.
Connection to the city’s past
The location close to the Tagus River helps explain the existence of several infrastructures in the area. There are signs of activities linked to the production and preparation of fish, as well as storage areas. This evidence reinforces the importance of downtown Lisbon as a strategic point in ancient trade networks, with a direct connection to the river.
Access to the galleries is also limited by the number of visitors. The Lisboa Secreta portal adds that tickets tend to sell out quickly whenever they become available. For now, there is still no information about the next opening or ticket sales. Details should be released later.
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