Terme di Caracalla, Rome

These vast ruins are the Terme di Caracalla, an imperial Roman bathing complex created under the Severan rulers and carrying Caracalla’s name. It opened in the year two hundred and sixteen, after a rapid building campaign that began under Septimius Severus and continued under his son. Water has returned to the entrance pool in recent years, flowing there again after roughly eighteen centuries.

The surviving shell once enclosed gardens, changing areas, bathing chambers, and exercise spaces. Heat came from fires of wood and coal beneath the floors, warming both water and rooms. At its busiest, the complex could hold about sixteen hundred bathers at once, with several thousand using it across a day.

Its life ended when the Gothic king Vitiges severed Rome’s water supply during the siege of five hundred and thirty-seven. Later generations stripped these ruins for stone and decoration; material from here entered Pisa Cathedral and Santa Maria in Trastevere. Yet the place keeps acquiring new lives: performances have filled this setting since the nineteen thirties, turning imperial masonry into an open-air stage.