Galerias Romanas da Rua da Prata
Galerias Romanas da Rua da Prata, Roman archaeological cryptoporticus in Santa Maria Maior, Lisbon, Portugal.
The underground Roman galleries feature vaulted corridors measuring three meters in height and two to three meters in width with circular arched ceilings.
The cryptoporticus dates back to Emperor Augustus's reign between the first century BC and first century AD, serving as a foundation for buildings above.
The galleries contain Latin inscriptions indicating that Marcus Afranius Euporio and Lucius Fabius Daphnus dedicated this monument to the municipality.
The site opens twice yearly, typically in April and September, when municipal firefighters pump out water to allow guided group visits.
Visitors enter through a manhole cover in Rua da Conceição to explore this subterranean Roman structure beneath modern Lisbon streets.
Location: Santa Maria Maior
GPS coordinates: 38.70969,-9.13691
Latest update: March 7, 2025 01:37
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