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| YEAR | DATE | EVENT | HEAD OF STATE |
| 842 | Duchy - dinasty Piasti | duke Piast | |
| 861 | duke Zsemowit | ||
| 892 | duke Lesko I | ||
| 913 | duke Ziemomislao | ||
| 960 | duke Miecislao I | ||
| 992 | 25 may | duke Boleslao I | |
| 1025 | 28 october | king Miecislao II | |
| 1025 | Kingdom | king Boleslao I | |
| 1031 | king Bezprim | ||
| 1032 | king Miecislao II (II) | ||
| 1034 | 15 march | king Casimiro I | |
| 1058 | 28 november | king Boleslao II | |
| 1079 | Duchy | duke Ladislao I | |
| 1102 | 26 july | Kingdom | king Boleslao III |
| 1138 | Duchy - dinasty Piasti | duke Mieszko III | |
| 1202 | duke Enrico I duke of Cracovia | ||
| 1238 | duke Enrico II | ||
| 1241 | duke Boleslao | ||
| 1279 | duke Przemyslav II | ||
| 1295 | 26 june | Kingdom | king Przemyslaw II |
| 1296 | 8 february | dinasty Przemyslidi | king Vencewslao King of Boemia |
| 1305 | 21 june | Duchy - dinasty Piasti | duke Ladislao I |