The Diocletian Baths were a large public bathing complex in ancient Rome, built during the reign of Emperor Diocletian in the late 3rd century AD. They were part of a larger complex that included a gymnasium and gardens, showcasing the grandeur of Roman architecture and engineering. The baths could accommodate thousands of visitors and featured various rooms, including hot, warm, and cold baths. Today, the ruins of the Diocletian Baths are part of the Basilica di Santa Maria degli Angeli e dei Martiri, which was constructed in the 16th century. The site remains a significant historical landmark, illustrating the importance of bathing culture in ancient Roman society.