: 2nd century
- 3rd century
- 4th century
Decades: 170s 180s 190s 200s 210s - 220s - 230s 240s 250s 260s 270s
Years: 221 222 223 224 225 - 226 - 227 228 229 230 231
- Accession of Wei Mingdi as emperor of the Kingdom of Wei of China.
- Ardashir begins the Sassanid Dynasty, which will rule Persia until the seventh century.