Felinus and Gratian, who are patron saints of Arona and were associated to Carpophorus and Fidelis, were all members of the Theban Legion and the relics of Fidelis are both claimed by Como and Arona.
They are patron saints of Arona, near Milan, where their relics were enshrined. Legend holds that the associated pair of martyrs, Carpophorus and Fidelis, were members of the Theban Legion, whose relics were transferred to Arona during a time of war between Milan and Como. Both Como and Arona claim the relics of Fidelis. 
