The CirculAR Application by the National Technical University of Athens Research Team — Bringing Ancient Greece to Life

The APSIM project (Applications of Situated Simulations) aims to promote the Greek culture using innovative technologies, assisting both the general public and the new generations to get familiar and love the archaeological wealth of Greece. Using an Augmented Reality (AR) application, visitors of archaeological sites and museums will have the opportunity to enjoy a completely different tour-experience in the archaeological sites, resembling one of a video gaming!

Through the Augmented Reality application CirculAR, cultural heritage sites are transformed into immersive, interactive experiences that connect the past with the present. By combining scientifically documented content with advanced 3D modeling, spatial mapping, and gamification techniques, CirculAR enables users to explore monuments in their original form directly within their physical environment. Using a smartphone or tablet, visitors can visualize reconstructions, navigate around monuments, and engage with historical narratives in a dynamic and intuitive way. The appliation is available free of charge for Android devices via the Google Play Store and for iOS via the App Store.

The creation of the CirculAR application was the result of multifaceted collaboration among scientists from different fields: archaeologists, historians, computer engineers, interface designers, educators, and specialists in cultural policy development. It was developed within the framework of the European APSIM project, coordinated by the I-SENSE research team of the Research University Institute of Communication and Computer Systems (ICCS) of the National Technical University of Athens (NTU), with the participation of the Ephorate of Antiquities of the Cyclades, the Department of History and Archaeology of Aristotle University of Thessaloniki (University Excavation of Dion), the Epigraphic Museum of Athens, and the companies “GEOANALYSIS S.A.” and “Comic IKE.” The project is implemented under the “Research–Create–Innovate” action of the General Secretariat for Research and Technology, co-funded by the European Union.

The island of Delos– sacred in antiquity serving for millennia as a cultural, economic, and religious center – comes to life once again with the help of the innovative Augmented Reality application CirculAR. Using a simple smartphone or tablet, users of the application can experience an augmented reality journey: they can bring the monuments of Delos to life, view them in three dimensions, rotate them, walk around them, and enjoy a completely new, immersive visiting experience. The Temple of Apollo, the Stoa and the House of the Naxians, the Propylaea, the Terrace of the Lions—all those monuments that today are discernible only through their architectural remains—are revived through augmented reality and the use of scientifically documented content.

By using the camera, sensors embedded in mobile phones, and spatial mapping and positioning algorithms, the application “reads” the landscape and digitally places monuments or traces of the past exactly where they once stood. “The user participates, learns, and forms an emotional connection with the monument, transforming historical memory into a personal experience. And this is precisely the goal—so that we can creatively reconnect with the past,” notes researcher Dr. Tina Katika, Head of the XR Department at I-SENSE. (Source: apsim-project.eu, amna.gr)

APSIM’s Pilot Demonstrations in Delos Island

According to Dr. Angelos Amditis, project coordinator and Director of Research and Development at ICCS/NTUA, speaking to the Athens–Macedonian News Agency (ANA-MPA), “We are effectively bridging today’s imagination with life in the past. Through the application, you don’t simply see stones or foundations—you see stories, you see architecture, you see human activities. As a result, the application becomes a means of interpretation and understanding, as well as an educational tool grounded in scientific accuracy, essentially transforming the ordinary citizen from a passive observer into an active explorer. In this way, every visit becomes a process of discovery, navigation, knowledge gathering, interaction, and connection”. “The greatest value of the application is that it functions as a bridge across time, carrying the past into the present and the present into the future. In this way, it helps us preserve not only the material but also the intangible dimension of History—creating knowledge and experience, and forging a meaningful relationship between people and place.” (Source: amna.gr)

The application is not limited to Delos. Through the same technology, users can also explore other monuments across Greece. The aim is to incorporate additional monuments into the application in the future.

The Episcopal Basilica of Dion in Pieria. The ancient Dion, in the region of Pieria, was a sacred site of the Macedonian kingdom. The Roman colony of Dion flourished during the imperial period, particularly in late antiquity. Dion became an episcopal see, which reinforced its importance as an urban centre for the wider region. Near the centre of the ancient city and at a short distance from the Forum, the so-called Episcopal Basilica was built in the 5^th century CE, with at least two successive building phases.

The Philo’s Arsenal (Skeuotheke of Philon), located in the port of Zea (Piraeus), is a significant building preserving the technological memory of ancient warships. In 347 BC, the Athenians decided to construct a building in Piraeus to store the equipment of the military fleet—such as sails, ropes, and tents—during the winter months. The rectangular building, 130 meters long and 18 meters wide, called the Skeuotheke, was designed by the architects Philo and Euthydomos. Ancient writers considered the building the most eminent among the structures of ancient Greek architecture. Its virtual reconstruction was based on a surviving marble inscription, now exhibited at the Epigraphic Museum of Athens, which has been preserved in its entirety.

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