Ostrów Lednicki is an island in the southern portion of Lake Lednica in Poland, located between the cities of Gniezno and Poznań.
Existing ruins of a chapel, church and palace, thought to be the home of the first Kings of the Piast dynasty, have been roofed over for preservation.
Today the ruins are of archaeological significance, and the site of the Museum of the Piast Dynasty, opened in 1969.
During the reign of the first ruler of the Polish state, Mieszko I, and Boleslaw the Brave, it stood as one of the main defensive and administrative centers of the kingdom.
It is also one contender for the historical site of the personal baptism of Mieszko I, his wife Dobrawa of Bohemia, and his court, which took place on the Holy Saturday of April 14, 966.