Hidden inside the small church of Santa Maria foris portas in northern Italy lies one of medieval Europe's greatest artistic mysteries. The extraordinary frescoes of Castelseprio have fascinated scholars for decades, yet many of their secrets remain unsolved.

The UNESCO World Heritage site, located in the province of Varese, features a remarkable cycle of wall paintings depicting the childhood of Christ and the life of the Virgin Mary, drawing heavily on apocryphal gospels. Their artistic quality is undisputed, but historians still cannot agree on who painted them, exactly when they were created, or the full meaning behind their iconographic program.

Researchers believe the artist may have come from the eastern Mediterranean, as the paintings display stylistic features rarely seen in Western Europe during the early Middle Ages.

In an effort to answer these long-standing questions, the archaeological park has launched the scientific project "Vista," selected by the European Research Infrastructure for Heritage Science (E-RIHS). Beginning in September, experts from across Italy and several European countries will conduct a series of advanced, non-invasive diagnostic investigations to study the frescoes' materials, techniques and conservation status.

The findings will also support a major redesign of the church's museum display, scheduled for autumn 2026, with new visitor experiences aimed at making the site's history more accessible.

For historians and art lovers alike, Castelseprio remains a fascinating puzzle, and perhaps one that science is finally ready to solve.