| YEAR | DATE | EVENT | HEAD OF STATE |
| 1159 | Duchy - dinasty Piasti | duke Mieszko I | |
| 1211 | duke Casimiro I | ||
| 1230 | duke Mieszko II | ||
| 1246 | duke Ladislao I | ||
| 1282 | duke Boleslao I | ||
| 1313 | duke Boleslao II | ||
| 1356 | duke Boleslao III | ||
| 1382 | duke Ladislao II | ||
| 1401 | duke John | ||
| 1421 | duke Boleslao IV | ||
| 1437 | duke Boleslao V | ||
| 1460 | duke Nicola I | ||
| 1476 | duke Nicola II | ||
| 1497 | duke Hanus | ||
| 1532 | Union to Duchy of Slesia |