• Euphemia was born in Chalcedon near Constantinople in a prominent patrician family. In his youth received a Christian education, and in her town characterized with the virtues and beauty.• During the reign of Emperor Diocletian, who persecuted Christians, was charged because he refused to offer sacrifice to one city idol, and was closed with forty-nine other Christians.• First was tortured in various ways, then thrown into the amphitheater. Lions have killed her, but her body they are not eating, to the consternation of the pagans in the audience.• She died fifteen years old the 16th IX 304th.
• Christians have preserved her body. When they got freedom of religion, on her grave they built a large church.• Due to the progress of the Persians, her sarcophagus was 620th transported to Constantinople and placed him in a magnificent church, which was erected in her honor Emperor Constantine.• Due to new dangers sarcophagus with the body of St. Euphemia miraculously sailed to the sea in Rovinj dawn 13th VII 800th.• Since then she protect town Rovinj and fishermen.