A film in English On the Beginning of PolandTajemnice początków Polski - Wyspa władców
http://www.filmpolski.pl/fp/index.php?film=4224931
An edited Google translation:
ISLAND Rulers
A documentary - fictionalized (ed: ?)
Production: Poland
Year of production: 2012
Colour, 45 min
The title is Ostrow Lednicki, Island of Rulers, lying between Gniezno and Poznań, which was one of the residences of Mieszko I and Boleslaw the Brave (ed: first rulers of poland). The film presents its history from the beginning of the construction of a prince's residence on the island (the second half of the tenth century), to the invasion of Wielkopolska, and the destruction of the castle by the Czech prince Břetislav (c. 1038.).
Scenes from the prologue of the film present the State of Mieszko I as a historic breakthrough; existing pagan beliefs replaced by the Christian Faith, caused by the will of the Polanian Prince. One of the most important tasks in the plan was the construction of a new fortress, containing within the walls, sacred structures, churches and chapels, and the residencial palace of the Ruler. [TVP]