Visitors to Rome are still able to visit what was once the grandest and most luxurious public bath or thermae in the ancient city. Built from 298 to 306 AD, at its largest it spanned nearly 32 acres and could accompany as many as 3,000 bathers. Bathing was a social event and ritual significant to Roman society. Rooms ranged from cold to warm to hot water, with saunas, swimming pools, and spas. Baths were not just a form of relaxation for ancient Romans, but a social and even political act where business often took place.
These massive baths were named in honor of Emperor Diocletian, who at the time hadn’t even visited Rome. The entire complex included a gymnasium, library, stadium, gardens, galleries, and walking paths. Though most of the structures were destroyed by Goths in 537 AD, some of the ruins remain. The Basilica of St. Mary of the Angels was built into the central bath area by Michelangelo in 1561.
Located at Viale Enrico De Nicola 79, the site is open Tuesday to Sunday from 9 am to 7:45 pm. It is part of the National Roman Museum. Admission cost is €7, and also includes entry to Palazzo Altemps and Crypta Balbi. The closest metro stop is Termini or Repubblica.