Thermae Helenianae, Roman bath ruins near Porta Maggiore, Italy
The thermal complex features twelve underground chambers arranged in two parallel rows, located between Via Eleniana and Via Sommeiller in Rome.
Originally built during the Severan period, the baths underwent reconstruction between 323-326 CE under Helena, mother of Emperor Constantine I.
Renaissance architects Andrea Palladio and Giuliano da Sangallo documented the layout of these baths through detailed drawings before their partial demolition.
The remaining structures lie 4.5 meters below current street level, with visible sections of the ancient water reservoir that supplied the thermal complex.
During medieval times, one chamber of the water reservoir was converted into a Christian chapel dedicated to Saint Angelo.
Location: Rome
Part of: Regio V Esquiliae
GPS coordinates: 41.88922,12.51466
Latest update: March 6, 2025 14:42
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