YEAR | DATE | EVENT | HEAD OF STATE |
1241 | Duchy - dinasty Piasti | duke Corrado I | |
1274 | duke Enrico III | ||
1309 | duke Primko | ||
1331 | duke Enrico V | ||
1369 | duke Enrico VII | ||
1395 | duke Enrico VIII | ||
1397 | duke Enrico X | ||
1423 | duke Enrico IX | ||
1467 | duke Enrico XI | ||
1476 | Union to Duchy of Slesia |