Roman thermae of Lucus Augusti, Public thermae from ancient Rome in Lugo, Spain.

The Roman thermae of Lucus Augusti are the remains of an ancient bathing complex with different rooms such as changing areas, warm chambers, hot rooms, and cold water pools linked by stone corridors. The site clearly shows how people moved through the spaces and used each section for different temperature experiences.

The baths were built around 15 BC, at the same time as the founding of Lucus Augusti, and were declared a Monumento Histórico-Artístico in 1931. In later periods the vaulted bathing hall was converted into a Christian chapel. The complex now forms part of the Hotel Balneario de Lugo.

These public baths were a daily gathering place where the Roman community came to wash and spend time together in a shared space. Visiting was woven into the rhythm of daily life and held great importance for social bonds.

The remains are part of the Hotel Balneario de Lugo, so access to the apodyterium and the vaulted bath hall goes through the hotel's spa facilities rather than an open street site. The waters still used in the spa emerge at 43.8 °C. Check with the hotel before visiting, as the rooms are not a freely walkable ruin.

The bath hall was later converted into a Christian chapel, which is why the vaulted room visitors see today is not purely Roman in use. The waters that fed the baths still rise at 43.8 °C and are used in the Hotel Balneario de Lugo, so the same spring has been in service for about two millennia.