Converts to Christianity from ancient Roman religions

Roman emperor from 306 to 337 and first to convert to Christianity (272–337)

Tertullian (; ; 155 – 220 AD) was a prolific early Christian author from Carthage in the Roman province of Africa. He was the first Christian author to produce an extensive corpus of Latin Christian literature and was an early Christian apologist and a polemicist against heresy, including Gnosticism.

Christian theologian (c.150 – c.215)

late 1st/early 2nd century Christian author and Patriarch of Antioch

Egyptian missionary, saint depicted with a wheel

2nd century CE Christian apologist and martyr

Cyprian (; ; to 14 September 258 AD) was a bishop of Carthage and an early Christian writer of Berber descent, many of whose Latin works are extant. He is recognized as a saint in the Western and Eastern churches.

Lucius Caecilius Firmianus Lactantius () was an early Christian author who became an advisor to Roman emperor Constantine I, guiding his Christian religious policy in its initial stages of emergence, and a tutor to his son Crispus. His most important work is the Institutiones Divinae ("The Divine Institutes"), an apologetic treatise intended to establish the reasonableness and truth of Christianity to pagan critics.

Patriarch of Antioch from c.169 to c.183

Greek bishop and saint

Greek Eastern Roman Empress by marriage to Byzantine emperor Theodosius II (c.401-460)

1st century AD King of Osroene

first Gentile to convert to Christianity

Roman Catholic saint

woman mentioned in the New Testament, regarded as first documented convert to Christianity in Europe (Acts of the Apostles)

4th-century Roman empress and wife of Licinius

Hilarion (291–371), also known by the bynames of Thavata, of Gaza, and in the Orthodox Church as the Great was a Christian anchorite who spent most of his life in the desert according to the example of Anthony the Great (c. 251–356). While Anthony is considered to have established Christian monasticism in the Egyptian Desert, Hilarion, who lived in the coastal area near Gaza, is considered by his biographer Jerome (c. 342/347 – 420), to be the founder of Palestinian monasticism - regarding this claim see also Hilarion's contemporary, Chariton (mid-3rd century – c. 350), founder of monasticism

Roman military officer in Brittania

Roman philosopher, theologian and writer

christian martyr

Italian bishop and saint

Evodius (, Euōdias; ) was an early Christian identified by some Christian writings as the first bishop of Antioch. In some traditions, he is seen as succeeding Peter. He is regarded as one of the first identifiable post-apostolic Christians and is venerated as a saint.

2nd century translator of the Hebrew Bible into Greek

priest

Saint Polyeuctus (also Polyeuctes, Polyeuktos, Greek: Πολύευκτος) of Melitene (died 10 January 259) is a Christian saint from the Roman era.

high official of the Roman Empire

Castulus (died 286) is venerated as a martyr and saint. According to tradition, he was the chamberlain (or officer, valet) of Emperor Diocletian and the husband of Irene of Rome.

5th and 6th-century Neo-Platonic and Christian philosopher

saint

Montanus (; Greek: Μοντανός) was the second century founder of Montanism and a self-proclaimed prophet. Montanus emphasized the work of the Holy Spirit, in a manner which set him apart from the Great Church.

2nd century Roman martyr and German saint

5th century Roman usurper

guard of Roman emperor Galerius (died 306)

Gallo-Roman saint

early Christian missionary and martyr

Maturinus, or Mathurin (died ca. 300 AD) was a Gallo-Roman exorcist and missionary venerated as a saint.

Roman era Christian martyr

Bulgarian saint