Career
At the age of eight, he was martyred during the persecutions of the Roman emperor Diocletian in 303. Pope Gregory XVI presented Bishop Mathias Loras with the remains of Saint Cessianus in 1838. Bishop Loras brought the remains with him to the United States.
The remains were placed within a side altar in the new Saint Raphael"s Cathedral, in Dubuque, Iowa.
After renovations carried out in the mid-1980s at Saint Raphael"s Cathedral were completed, it was decided to place the remains of Saint Cessianus in the new main altar. On November 23, 1986, the wooden box containing the remains of Saint Cessianus was installed, during Mass, in the altar where they currently reside.