List of Augustae in the context of "Helena of Constantinople"

Julia Domna (Latin: [ˈjuːli.a ˈdomna]; c. 160 – 217 AD) was Roman empress from 193 to 211 as the wife of Emperor Septimius Severus. She was the first empress of the Severan dynasty. Domna was born in Emesa (present-day Homs) in Roman Syria to an Arab family of priests of the deity Elagabalus. In 187, she married Severus, then-governor of the Roman province of Gallia Lugdunensis. They had two sons, Caracalla and Geta. A civil war over the Roman throne broke out in 193, and shortly afterwards Severus declared himself emperor. The war ended in 197 with the defeat of the last of Severus's opponents.

As empress, Domna was famous for her political, social, and philosophical influence. She received titles such as "Mother of the Invincible Camps". After the elder of her sons, Caracalla, started ruling with his father, she was briefly co-empress with Caracalla's wife, Fulvia Plautilla, until the latter fell into disgrace. Following the death of Severus in 211, Domna became the first empress dowager to receive the title combination "Pia Felix Augusta", which may have implied greater powers being vested in her than what was usual for a Roman empress mother. Her sons jointly inherited the throne, and she acted as mediator in the conflicts that arose between them. Caracalla had Geta killed later that year.

Flavia Julia Helena (/ˈhɛlənə/; Ancient Greek: Ἑλένη, Helénē; c. AD 246/248 – 330), also known as Helena of Constantinople and in Christianity as Saint Helena, was a Greek Augusta of the Roman Empire and mother of Emperor Constantine the Great. She was born in the lower classes traditionally in the city of Drepanon, Bithynia, in Asia Minor, which was renamed Helenopolis.

Helena ranks as an important figure in the history of Christianity. In her final years, she made a religious tour of Syria Palaestina and Jerusalem, during which ancient tradition claims that she discovered the True Cross. The Eastern Orthodox Church, Catholic Church, Oriental Orthodox Churches, Anglican Communion, and the Lutheran Church revere her as a saint.

Annia Galeria Faustina the Younger (c. 130 AD, – 175/176 AD) was Roman empress from 161 to her death as the wife of emperor Marcus Aurelius, her maternal cousin. Faustina was the youngest child of emperor Antoninus Pius and empress Faustina the Elder. She was held in high esteem by soldiers and her husband as Augusta and Mater Castrorum ('Mother of the Camp') and was given divine honours after her death.

Julia Maesa (7 May before 160 AD – c. 224 AD) was a member of the Severan dynasty of the Roman Empire who was the grandmother of emperors Elagabalus and Severus Alexander, elder sister of empress Julia Domna, and mother of Julia Soaemias and Julia Mamaea. She wielded influence during the reigns of her grandsons as Augusta of the Empire from 218 to her death, especially on their elevation to emperors.

Born in Emesa, Syria (modern day Homs), to an Arab family of priests of the deity Elagabalus, Maesa and her sister Domna were the daughters of Julius Bassianus. Through her sister's marriage, Maesa became sister-in-law to Septimius Severus and aunt of Caracalla and Geta, who all became emperors. She married fellow Syrian Julius Avitus, who was of consular rank. They had two daughters, Soaemias and Mamaea, who became mothers of Elagabalus and Severus Alexander, respectively.