The Gesta principum Polonorum is the oldest known medieval chronicle documenting the history of Poland from the legendary times until 1113. Written in Latin by an anonymous author, it was most likely completed between 1112 and 1118, and its extant text is present in three manuscripts with two distinct traditions. Its anonymous author is traditionally called Gallus, a foreigner and outcast from an unknown country, who travelled to the Kingdom of Poland via Hungary. Gesta was commissioned by Poland's then ruler, Boleslaus III Wrymouth; Gallus expected a prize for his work, which he most likely received and of which he lived the rest of his life.

The history of Poland spans over a thousand years, from medieval tribes, Christianization and monarchy; through Poland's Golden Age, expansionism and becoming one of the largest European powers; to its collapse and partitions, two world wars, communism, and the restoration of democracy.