Their Greek and Latin acts agree that, after suffering many torments, they were put to death, on three different days, at Apollonia in Phrygia, in the persecution of Decius. Sozomen tells us that Cæsarius, who had been prefect and consul, built at Constantinople a magnificent church under the invocation of Saint Thyrsus, with a portion of whose relics it was enriched. Another church within the city bore his name, as appears from the Menæa, on the 14th of December. In the cathedral of our Lady at Sisteron, in a church at Limoges, etc. Saint Thyrsus is one of the patrons. Many churches in Spain bear his name. Silon, king of Oviedo and Asturia, in a letter to Cyxilas, archbishop of Toledo in 777, says, that the queen had sent presents to the church of Saint Thyrsus, which the archbishop had built, viz. a silver chalice and paten, a basin to wash the hands in, with a pipe and a diadem on the cover to be used when the blood of our Lord was distributed to the people.
- Father Alban Butler. “Saint Thyrsus, Saint Leucius, and Saint Callinicus, Martyrs”. , 1866. CatholicSaints.Info. 28 January 2013. Web. 23 February 2017. <>