Flavia Julia Constantia (after 293 – c. 330) was the daughter of the Roman Emperor

Roman Emperor

The Roman emperor was the ruler of the Roman State during the imperial period . The Romans had no single term for the office although at any given time, a given title was associated with the emperor...

 Constantius Chlorus

Constantius Chlorus

Constantius I , commonly known as Constantius Chlorus, was Roman Emperor from 293 to 306. He was the father of Constantine the Great and founder of the Constantinian dynasty. As Caesar he defeated the usurper Allectus in Britain and campaigned extensively along the Rhine frontier, defeating the...

 and his second wife, Flavia Maximiana Theodora

Flavia Maximiana Theodora

Flavia Maximiana Theodora was the stepdaughter of Maximian. Her parents were Flavius Afranius Hannibalianus and wife, divorced before 283, Eutropia, later wife of Maximian. Theodora's father was consul in 292, and praetorian prefect under Diocletian...

.

In 313, Emperor Constantine I

Constantine I

Constantine the Great , also known as Constantine I or Saint Constantine, was Roman Emperor from 306 to 337. Well known for being the first Roman emperor to convert to Christianity, Constantine and co-Emperor Licinius issued the Edict of Milan in 313, which proclaimed religious tolerance of all...

, who was the half-brother of Constantia, gave her in marriage to his co-emperor Licinius

Licinius

Licinius I , was Roman Emperor from 308 to 324. Co-author of the Edict of Milan that granted official toleration to Christians in the Roman Empire, for the majority of his reign he was the rival of Constantine I...

, on occasion of their meeting in Mediolanum

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

. She bore a son, Valerius Licinianus Licinius, in 315, and when the struggle between Constantine and Licinius began in 316, she stayed on her husband's side. A second war started between the two emperors in 324; after Licinius' defeat, Constantia interceded with Constantine for her husband's life. Constantine spared Licinius life, and obliged him to live in Thessalonica as a private citizen, but the following year (325), he ordered that Licinius be killed. A second blow for Constantia was the death, also by order of Constantine, of her son Valerius.

In the following years, Constantia lived at her brother's court, receiving honors (her title was nobilissima femina). She converted to Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

, supporting the Arian

Arianism

Arianism is the theological teaching attributed to Arius , a Christian presbyter from Alexandria, Egypt, concerning the relationship of the entities of the Trinity and the precise nature of the Son of God as being a subordinate entity to God the Father...

 party at the First Council of Nicaea

First Council of Nicaea

The First Council of Nicaea was a council of Christian bishops convened in Nicaea in Bithynia by the Roman Emperor Constantine I in AD 325...

 (325).

The city of Constanţa

Constanta

Constanța is the oldest extant city in Romania, founded around 600 BC. The city is located in the Dobruja region of Romania, on the Black Sea coast. It is the capital of Constanța County and the largest city in the region....

, Romania

Romania

Romania is a country located at the crossroads of Central and Southeastern Europe, on the Lower Danube, within and outside the Carpathian arch, bordering on the Black Sea...

is named after her.