3rd century in architecture

Buildings and structures

209 – Ghal'eh Dokhtar castle built in Persia by future Sassanid Emperor Ardashir I.
216 – Baths of Caracalla, Rome, completed.^[1]
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.
298–299 – Arch of Galerius in Thessaloniki (Macedonia) built.

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