Attilio was a legendary martyr associated with the Theban Legion. According to tradition, he belongs to this group of soldiers who were martyred for their Christian faith. While he is not listed in contemporary Roman martyrologies, he remains a figure of local devotion. His memory is preserved primarily in the region of Trino Vercellese, located in the Piedmont area of northwest Italy.
Veneration and iconography
Local devotion to this saint is centered near Trino Vercellese. In religious art, he is often represented wearing a helmet and holding a flag. He is also frequently identified by the palm branch, which serves as a symbol of his martyrdom. His feast day is observed annually on 28 June.