Saint Domnius (also known as Saint Dujam or Saint Duje, Saint Domnio, Saint Doimus, or Saint Domninus) was a 3rd-century Bishop of Salona and patron of the city of Split. Salona was a large Roman city serving as capital of the Province of Dalmatia. Today it is located near the city of Split in modern Croatia. Saint Domnius was martyred with seven other Christians in the persecutions of the Emperor Diocletian.