If the legitemate line of the Piast Dynasty gets extinct because of the plotting of Sieciech in the 11th century, will the Premyslids try to get the Polish throne or Sieciech's dynasty will rule Poland.
Yeah, I think the Premyslids and Gryfita(the Pomeranian house) will partition Poland.I'm not sure if Sieciech was strong enough to keep the throne, although I agree he was ambitious enough to try. But he was quite unpopular, AFAIR, so I believe his rule wouldn't have lasted too long - a civil war would have been almost certain, possibly also division of Poland between variosu pretenders. Eventually it might lead to conquest of Poland (or at least Silesia and/or Cracow) by Premyslids. .
When did the Silesian Piasts split off? Is that before or after the PoD?