3rd century in architecture
See also: 2nd century in architecture, 4th century in architecture and the architecture timeline.
Buildings
- 209 - Ghal'eh Dokhtar castle built in Persia by future Sassanid Emperor Ardashir I.
- 216 - Baths of Caracalla, Rome completed.
- 224 - Palace of Ardashir, built near Ghal'eh Dokhtar by Ardashir I.
- 266 - Bishapur city founded by Emperor Shapur I as a capital for the Sassanid Empire
- 290s - Diocletian's Palace, Split completed.