See also: 4th century in architecture, other events of the 400s, 6th century in architecture and the architecture timeline.

Events

• 447: November 6 - An earthquake levels large parts of the Theodosian Wall of Constantinople. Repairs, under the direction of urban prefect Cyrus of Floros, are effected within 60 days.

Structures

• 408 – 413 The Theodosian Wall, is built, as a fortification of Constantinople, running from the Sea of Marmara on the south, to the suburb of Blachernae, near the Golden Horn, on the north.
• 420s – San Giovanni Evangelista, Ravenna constructed.
• 422 – 432 - Construction of Santa Sabina all'Aventino Basilica in Rome.
• 427 – Anak Palace of Goguryeo is completed.
• 430s – Baptistry of San Giovanni in Laterano, Rome reconstructed.
• 430s – Santa Maria Maggiore, Rome reconstructed.
• About 450 – Baptistry of Neon completed.
• c. 475 – Construction of the Church of Saint Simeon in the Byzantine Empire.
• 490 – Arian Baptistry, Ravenna begun.
• 490s – Basilica of St German, Auxerre constructed.

Births

• 474 - Anthemius of Tralles

Deaths