|Covid-19|550s – Procopius writes The Buildings of Justinian (Greek: Περὶ Κτισμάτων Perì Ktismáton, Latin: De Aedificiis, "On Buildings").
500–509 – Basilica des Apôtres constructed.
About 500 – Arian Baptistry and Archbishop's Chapel, Ravenna completed.
504 – Basilica of Sant'Apollinare Nuovo, Ravenna dedicated to Christ the Redeemer (completed about 520).
520s – Mausoleum of Theodoric, Ravenna completed.
523 – Songyue Pagoda of China completed.
527 to 536 – Construction of the Church of Saints Sergios and Bacchos in Constantinople.
527 to 548 – Construction of the Basilica of San Vitale, Ravenna, begun under the Ostrogoths and finished by the Byzantines.
532 to 537 – Hagia Sophia in Constantinople built by Isidore of Miletus and Anthemius of Tralles.
After 540 – Construction of Taq-i Kisra (iwan) at Ctesiphon in the Sasanian Empire begins.
549 – Basilica of Sant'Apollinare in Classe near Ravenna consecrated.
550 – Rebuilt Church of the Holy Apostles in Constantinople, built by Anthemius of Tralles and Isidore of Miletus, dedicated.
About 560 – First Nantes Cathedral constructed.
569 – Hwangnyongsa temple completed in Gyeongju, Silla.
About 570 – Basilica of St. Sernin, Toulouse constructed.
582 – Daxing (大兴城) founded in China by Emperor Wen of Sui.
593 – Gangō-ji (元興寺) temple first built in Asuka, Japan (later moved to Nara).
6th century in architecture Wikipedia
See also: 5th century in architecture, 7th century in architecture and the architecture timeline.