For years, students at a high school just steps from the Colosseum in Rome have spun tales of mysterious rooms hidden underneath the gymnasium floor. Now, it turns out those rumors have more than a grain of truth to them.

Students on several clandestine explorations happened upon an ancient structure beneath their school. Upon notifying their teacher, who notified the authorities, archaeologists arrived to take a more detailed look. Following an excavation earlier this year, archaeologists have announced that the dark corridors and dimly lit chambers actually belonged to a luxurious second-century villa.

The Liceo Scientifico Cavour (Cavour Scientific High School) is located in a building near the Colosseum that originally housed a Catholic missionary congregation. When the missionaries’ headquarters were constructed in the late 19th century, early archaeological exploration of the foundation revealed part of a “domus” — a large ancient Roman house. This neighborhood is incredibly important in Roman history, as figures such as Cicero, Pompey and Octavian (later known as Augustus) lived there, but is not well-understood archaeologically because of all the modern buildings on top of the ancient layers.