Iglesia de los Santos Apóstoles
Around 370, Gratian's mother Marina Severa died and was interred in the Church of the Holy Apostles. Valentinian married again, wedding Justina. On the 9 April 370, according to the "Consularia Constantinopolitana" and the "Chronicon Paschale", the Church of the Holy Apostles adjoining the Mausoleum of Constantine in Constantinople was inaugurated. In autumn 371, Gratian's half brother, called Valentinian, was born to Justina, possibly at Augusta Treverorum (Trier).