Saint Lucian of Beauvais is a Christian martyr of the Catholic Church, called the "Apostle of Beauvais." He was killed in the 3rd century during the Diocletian persecution, although later traditions make him a martyr of the 1st century instead. This was because the church of Beauvais attempted to claim apostolic origins for itself. Odo, bishop of Beauvais during the 9th century, was the first writer to designate Lucien as the first bishop of Beauvais.

Odo I was a West Frankish prelate who served as abbot of Corbie in the 850s and as bishop of Beauvais from around 860 until his death in 881. He was a courtier and a diplomat, going on missions to East Francia and the Holy See.