His date of death varies, and is sometimes given as the 3rd, 4th, or 6th centuries.

His passio dates from the 15th century and was modeled mostly on that of a saint with the same name, who was bishop of Siponto, while his brothers Florentius and Felix were martyred at Furci in the Abruzzo, along with Justin's niece Justa.

[1] Chieti's cathedral (Duomo) was dedicated to him – and built – in the 9th century.

Most of his relics, such as his arm, are found in an urn placed in the crypt of the cathedral of Chieti.

His celebration was moved to 14 January in Chieti and later to 11 May.