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The Congress of Gniezno (Polish: Zjazd gnieźnieński, German: Akt von Gnesen or Gnesener Übereinkunft) was an amicable meeting between the Polish Duke Bolesław I the Brave and Emperor Otto III, which took place at Gniezno in Poland on 11 March 1000. Scholars disagree over the details of the decisions made at the convention, especially whether the ruler of Poland was pledged the king's crown or not.