4th century in architecture
Events
- 313 – Emperor Constantine issues the Edict of Milan, legislating toleration of Christian worship in the Roman Empire. The 4th century sees the construction of many churches, especially in Rome, and in the eastern empire.
Buildings and structures
Buildings
- Early – Church of St. George, Sofia is probably completed.
- 303 – Arch of Galerius in Thessaloniki is dedicated.
- 306 – Rotunda of Galerius in Thessaloniki is built.
- c.310 – Aula Palatina at Trier is built.
- 312–315 – Arch of Constantine in Rome is built.
- c.326–380 – Church of the Holy Sepulchre in Jerusalem.
- 368 – Valens Aqueduct in Constantinople is completed.
- From 382 – San Nazaro in Brolo in Milan is begun by Ambrose.
- 386 – Basilica of Sant'Ambrogio in Milan, built by Ambrose, is consecrated.
- c.390s – Kasagh Basilica in Armenia is built.
- 393 – The Forum of Theodosius in Constantinople, reconstructed over the Forum Tauri, is inaugurated.
- Dadhimati Mata Temple in Rajasthan is built.
Churches in Rome
- San Marcello al Corso
- Santi Quattro Coronati
- Old St. Peter's Basilica
- Basilica di San Giovanni in Laterano
- Santa Croce in Gerusalemme
- Santa Susanna
- Basilica di San Marco
- Basilica di Sant'Anastasia al Palatino
- Santa Costanza
- Santa Maria in Trastevere
- Santi Nereo e Achilleo
- San Lorenzo in Damaso
- Basilica of Saint Paul Outside the Walls
- Santi Giovanni e Paolo
- San Sisto Vecchio
- Basilica di San Clemente
- San Lorenzo in Lucina
- Santi Marcellino e Pietro al Laterano
- Santa Pudenziana
- San Sebastiano fuori le mura
- Basilica di San Vitale