Alaric was succeeded in the command of the Gothic army by his brother-in-law, Ataulf, who married Honorius ' sister Galla Placidia three years later.

In 417, Constantius married Honorius ' sister, Galla Placidia, much against her will.

In his final years, Honorius reportedly developed a physical attraction to his half sister, and in order to escape his unwelcome attentions, Galla Placidia and her children, the future emperor Valentinian III and his sister, Honoria, fled to Constantinople.

The following year, however, the Eastern Emperor Theodosius II elected his cousin Valentinian III, son of Galla Placidia and Constantius III, as Emperor.

Aelia Galla Placidia ( 392 – November 27, 450 ), daughter of the Roman Emperor Theodosius I, was the Regent for Emperor Valentinian III from 423 until his majority in 437, and a major force in Roman politics for most of her life.

Placidia was the daughter of Roman Emperor Theodosius I and his second wife Galla, who was herself daughter of Emperor Valentinian I and his second wife Justina.

His mother Galla Placidia ends her regency, but continues to exercise political influence at the court in Rome.

Both the Empress Galla Placidia and her husband Constantius III favored Eulalius, who had been elected first.

* 421 – Galla Placidia, wife of the Emperor Constantius III, becomes a widow for the second time when he dies suddenly of an illness.

Theodosius and Galla had a son Gratian, born in 388 who died young and a daughter Aelia Galla Placidia ( 392 – 450 ).

Empress Galla Placidia gives him considerable influence over imperial policy.

* Bonifacius, weakened by the civil war against empress Galla Placidia, sues for peace and is elevated to the rank of supreme commander ( magister militum ) of Africa.

Coin of Galla Placidia

* January 1 – Emperor Honorius forces his half-sister Galla Placidia into marriage to Constantius, his general ( magister militum ).

His 3-year-old half-sister, Galla Placidia, is send to Rome where she spent her childhood in the household of Stilicho and his wife Serena.

* January 1 – Galla Placidia, half-sister of emperor Honorius, is married to the Visigothic king Ataulf at Narbonne.

King Ataulf and his pregnant wife Galla Placidia leave Gallia Narbonensis, they relocate at Barcelona.

Under the influence of Aetius, he is convicted of treason by empress-mother Galla Placidia.

* November 27 – Galla Placidia, Roman Empress ( b. 392 )

* Galla Placidia, Roman Empress and daughter of Theodosius I ( d. 450 )

However, in 409, King Alaric I of the Visigoths simply bypassed Ravenna, and went on to sack Rome in 410 and to take Galla Placidia, daughter of Emperor Theodosius I, hostage.

After many vicissitudes, Galla Placidia returned to Ravenna with her son, Emperor Valentinian III and the support of her nephew Theodosius II.

Ravenna enjoyed a period of peace, during which time the Christian religion was favoured by the imperial court, and the city gained some of its most famous monuments, including the Orthodox Baptistery, the so-called Mausoleum of Galla Placidia ( she was not really buried there ), and San Giovanni Evangelista.

His second wife ( but never declared Augusta ) was Galla, daughter of the emperor Valentinian I and his second wife Justina.

He had two children in his marriage with Afinia Gemina Baebiana: Gaius Vibius Volusianus, later Emperor, and a daughter, Vibia Galla.

He put away his Christian wife, Romane-Warq, and started a harim by marrying the daughters of ' Afar and Galla chiefs, including a daughter and niece of Abba Jifar of Jimma.

According to Paul the Deacon, Imola was in 412 the scene of the marriage of Ataulf, King of the Visigoths, to Galla Placidia, daughter of Emperor Theodosius the Great.

Honoria was the only daughter of later Emperor Constantius III and Galla Placidia.

His successor, Ataulf, married Galla Placidia, daughter of Theodosius.

* Galla Placidia, daughter of Theodosius I

* Galla Placidia, Roman empress, daughter of Emperor Theodosius the Great.

Valentinian I was the twice-married brother of Valens ; his first wife Marina Severa bore him one son ( Gratian, whose first wife was Constantia, the daughter of Constantius II ), and his second wife Justina ( the widow of Magnentius ) bore him two children, a daughter ( Galla, the second wife of Theodosius I ; see below ) and a son ( Valentinian II ).

The House of Theodosius was related to the Valentinian Dynasty by marriage, since Theodosius I had married Galla, a daughter of Valentinian I.

Their daughter was Galla Placidia.

Theodosius I married twice ; first to Aelia Flaccilla, who bore him two sons ( Arcadius and Honorius ), and second to Galla ( daughter of Valentinian I by his second wife Justina, widow of Magnentius ), who bore him a daughter ( Galla Placidia ).

The largest was thought to contain the remains of Galla Placidia ( died 450 ), daughter of the Roman Emperor Theodosius I.

* Winter – The widowed emperor Theodosius I takes Valentinian II in protection and marries his sister Flavia Galla.

After the death of his father in 421, Valentinian followed his mother and his sister ( Justa Grata Honoria ) to Constantinople, when court intrigue saw Galla Placidia forced to flee from her half-brother, Emperor Honorius, and the young Valentinian went to live at the court of his cousin Theodosius II.

Constantius was appointed patricius and in 417, the year of his second consulate held with Honorius as colleague, he married Galla Placidia, tying himself to the House of Theodosius.

Joannes had hoped that he could come to an agreement with the emperor Theodosius, but when Theodosius II elevated the young Valentinian III first to Caesar, then to co-emperor as an Augustus ( undoubtedly influenced by Valentinian's mother Galla Placidia ), he knew he could only expect war.

* Galla ( wife of Theodosius I )

** From marriage between Theodosius I and Galla.