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Late reign, death and succession

During his last years of life Mieszko remained loyal to the alliance with the Holy Roman Empire. In 991 he arrived at a gathering in Quedlinburg, where he participated in the customary exchange of gifts with Otto III and Empress Theophanu. In the same year he took part in a joint expedition with the young king to Brandenburg.

Mieszko died on 25 May 992. Sources give no reasons to believe that his death occurred from causes other than natural. According to Thietmar the Polish ruler died "in an old age, overcame with fever". Probably he was buried in the Poznań Cathedral. The remains of the first historical ruler of Poland have never been found and the place of his burial is not known with certainty. In 1836–1837 a cenotaph was built for Mieszko I and his successor Bolesław I the Brave in the Golden Chapel (Polish: Złota Kaplica) at the Poznań Cathedral, where the damaged remains found in the 14th-century tomb of Bolesław were placed.

According to Thietmar Mieszko I divided his state before his death among a number of princes. They were probably his sons: Bolesław I the Brave, Mieszko and Lambert.

In 1999 the archeologist Hanna Kóčka-Krenz located what's left of Mieszko's palace-chapel complex in Poznań.