For 10 points, name this birth country of Joseph Conrad and Henry Sienkiewicz.
The inhabitants of this country nail a Cossack to a Ukrainian tree in Gogol's Taras Bulba. A Spanish play set in this country depicts a prince, Segismundo, who is locked in a tower and declares that "all of life is but a dream." In The Age of Innocence, Ellen tries to divorce a nobleman from this country. An author born in this country wrote an novel about a sailor who abandoned the Patna. Another novelist from this country chronicled the love between Ligia and Marcus Vincius in Quo Vadis. For 10 points, name this birth country of Joseph Conrad and Henry Sienkiewicz.
The inhabitants of this country nail a Cossack to a Ukrainian tree in Gogol's Taras Bulba.
Republic of Poland [or Rzeczpospolita Polska; prompt on Russia before "Spanish play"]