Felicissimus and Agapitus
Felicissimus and Agapitus were two of the six deacons of Pope Sixtus II who were martyred with him on or about 6 August 258, Felicissimus and Agapitus on the same day as the Pope. The seventh deacon, Lawrence of Rome, was martyred on 10 August of the same year.
The Tridentine Calendar commemorated Sixtus, Felicissimus, and Agapitus on the feast of the Transfiguration of the Lord, 6 August. They remained in that position in the General Roman Calendar until 1969, when, with the abolition of commemorations, the memorial of Pope Sixtus "and his companions" was moved to 7 August, the day immediately after that of their death.
- Michael Ott, Sixtus II in Catholic Encyclopedia
- Butler, Alban. "SS Sixtus II, Agapitus, Felicissimus, and Companions, Martyrs (258)". In John Cumming. Butler's Lives of the Saints: New Full Edition. Tunbridge Wells, Kent, England: Burnes & Oates. pp. 44–45. Retrieved 2008-06-18.
- Louise Ropes Loomis, The Book of the Popes (Liber Pontificalis) (Arx Publishing 2006 ISBN 978-1-88975886-2), p. 31
- Calendarium Romanum (Libreria Editrice Vaticana 1969), p. 133