Archaeologists have discovered an ancient Roman gladiator school in Austria, complete with a training arena, cell blocks and a bath complex.

According to Discovery News, the remains of the school, which were buried at Carnuntum, near Vienna, were detected through remote-sensing techniques, not excavations. Researchers reconstructed the gladiator center in 3-D virtual models.

Archaeologists have been studying the Carnuntum site, which is on the south bank of the River Danube, for more than a century. Prior excavations of the military city revealed parts of a civilian town, an amphitheater and a legionary fortress.

The school, called a ludus, covers 30,138 square feet, and is arranged around a central courtyard. It was built during the second century A.D.

The archaeological research is being led by Wolfgang Neubauer of the University of Vienna.

The researchers say the arena would have been surrounded by wooden spectator stands on stone foundations, which were visible in the radar data. The measurements also show a post-hole figure in the middle of the arena.

"This might be the foundation of the palus, a wooden pole used for exercising blows with the sword and body slams with the shield," Neubauer and colleagues wrote.

Researchers also detected cell blocks in the southern wing of the school, which covered 32 to 75 square feet. Similar cell designs have been found at a gladiator school close to the Flavian amphitheater in Rome, the researchers wrote.

Other rooms in the school were a bit nicer, and perhaps decorated with tile floors. The chambers "were most likely reserved for the highest ranking gladiators or the instructors, many of whom probably were drawn from the ranks of senior and ex-gladiators," the researchers wrote.

The site also contains evidence of a bath complex, which is where the gladiators would recover from their training.

The archaeologists found the outline of the school over the last few years using non-invasive techniques such as ground-penetrating radar, aerial photography and magnetometer surveys. They also transmitted an electromagnetic field to create currents in the soil. By figuring out the soil's electrical conductivity and magnetism, scientists can discover if the earth has been heated, which reveals the location of hidden bricks, which were made by heating clay.