A digital reconstruction of ancient Rome in A.D. 320 featuring the Colosseum.

A newly-launched 3D model of ancient Rome lets viewers experience the city as it was in its heyday in the fourth century.

A new interactive 3D reconstruction of ancient Rome is giving viewers the opportunity to virtually transport themselves back in time and explore the capital of the Roman Empire as it was during its heyday.

Called Rome Reborn: Flight over Ancient Rome, the digital model presented by Flyover Zone, an educational technology company, offers both a bird's-eye view and on-the-ground perspectives of ancient Rome and its many historical monuments, including the Colosseum, Pantheon, Baths of Caracalla and the Roman Forum, as they may have appeared in A.D. 320, right before the capital city was moved to Constantinople, which was later followed by the fall of the Western Roman Empire, according to a statement.

At its prime, Rome would have had a population of 1 million — making it one of the most populous cities in Europe — and a skyline peppered with approximately 7,000 buildings spread across 5.3 square miles (13.7 square kilometers).

This virtual version of the city is decades in the making and is the brainchild of Bernard Frischer, a digital archaeologist at the Luddy School of Informatics, Computing and Engineering at Indiana University Bloomington. Frischer initially came up with the idea in 1974 while he was the Rome Prize Fellow in Classics at the American Academy in Rome.

During his studies, Frischer visited the Museum of Roman Civilization and saw a physical model of ancient Rome. He knew he could make a better, computerized version himself.

"I remember looking down from a balcony at the physical model while in Rome and taking photos of it," Frischer told Live Science. "I used this as the inspiration for the reconstruction and I thought it would be nice if I could digitize it."

Over the course of several decades, Frischer worked with a team of archaeologists and historians to ensure that his replica was accurate while also consulting a variety of historical texts that recorded what the capital of the Roman Empire would have looked like in fourth century Europe. He also worked with engineers who scanned the original museum model, which served as the groundwork for the digital city, which is on a scale of 1-to-25.

Frischer described the entire research process as "tedious" but in the end, the project was worth the effort.

An aerial view of the city from the southeast. In the foreground are the Baths of Caracalla. In the middle ground is the Circus Maximus racetrack and the Colosseum (to the right). In the distance is the Tiber River.

"I looked at old site plans and photographs of ruins and put it all together," Frischer said. "I wanted to have a visualization to bring people up to speed to see what the city would've looked like instantly. In two hours of exploration, people today will know more than what a PhD student would've known in the 1970s."

A view of the Tiber River running through the reconstruction of ancient Rome.

The first version of Rome Reborn launched in 2007 followed by two subsequent versions released in 2008 and 2018. For the new, fourth version, which launched Wednesday (Nov. 8), the team added in new and updated recreations of some of the monuments that weren't included in previous versions, such as the Baths of Caracalla, the temples on the Capitoline Hill, the Stadium of Domitian (modern-day Piazza Navona) and the theaters of Balbus, Marcellus and Pompey the Great. 

"I hope that people's curiosity is aroused and that they start the process of falling in love with antiquity in general, but to the city of Rome specifically," Frischer told Live Science. "I want people to see the beauty and the grandeur and the innovation of ancient Rome. It was above and beyond other cities during that time."

Rome Reborn: Flight over Ancient Rome version 4.0 is currently available for download. Flyover Zone also offers 13 other virtual tours on Yorescape.com, including the Acropolis in Athens and the Tomb of Ramesses VI in Egypt. Normally an annual subscription is $49.99 but for the Nov. 8 launch, the Yorescape app is offering a free, one-week trial subscription.