Time Line 304
- Saint Agapius imprisoned
- death of Pope Saint Marcellinus
- martyrdom of Saint Anastasia
- martyrdom of Saint Ansanus of Baptizer
- martyrdom of Saint Adrian of Nicomedia
- martyrdom of Saint Anysia of Salonika
- martyrdom of Saint Andronicus
- martyrdom of Saint Afra
- martyrdom of Saint Anastasius the Fuller
- martyrdom of Saint Barlaam
- martyrdom of Saint Crispina
- martyrdom of Saint Chrysogonus
- martyrdom of Saint Carterius
- martyrdom of Saint Cyprian
- martyrdom of Saint Dionysius
- martyrdom of Saint Didymus
- martyrdom of Saint Duje
- martyrdom of Saint Dalmatius of Pavia
- martyrdom of Saint Donatus the Martyr
- martyrdom of Saint Flavian of Civita Vecchia
- martyrdom of Saint Febronia
- martyrdom of Saint George
- martyrdom of Saint Caius
- martyrdom of Saint Gordius
- martyrdom of Saint Irenaeus of Sirmium
- martyrdom of Saint Justus
- martyrdom of Saint Justina of Antioch
- martyrdom of Saint Mucius
- martyrdom of Saint Marcellinus
- martyrdom of Saint Pastor
- martyrdom of Saint Peter
- martyrdom of Saint Patricia of Nicomedia
- martyrdom of Saint Restituta
- martyrdom of Saint Rufus and his household
- martyrdom of Saint Romulus the Martyr
- martyrdom of Saint Secundian the Martyr
- martyrdom of Saint Tipasio of Tigava
- martyrdom of Saint Timothy of Gaza
- martyrdom of Saint Thecla
- martyrdom of Saint Ursicius
- martyrdom of Saint Victoria
- martyrdom of Pope Saint Marcellinus
- martyrdom of the Martyrs of Lichfield
- matryrdom of Saint Irene
| 303 | 305 |
