of the royal title to Mieszko II, his agreement with the counts of Tusculum, and the papal interactions with Conrad and Bolesław. Death and burial According to Cosmas of Prague, Bolesław I died shortly after his coronation on 17 June 1025. Already in advanced age for the time, the true cause of death is unknown and remains a matter of speculation. Chronicler Jan Długosz (and followed by modern historians and archaeologists) writes that Bolesław was laid to rest at the Archcathedral Basilica of St. Peter and St. Paul in Poznań. In the 14th century, Casimir III the Great reportedly ordered the construction of a new, presumably Gothic, sarcophagus to which he transferred Bolesław's remains. The medieval sarcophagus was partially damaged on 30 September 1772 during a fire, and completely destroyed in 1790 due to the collapse of the southern tower. Bolesław's remains were subsequently excavated from the rubble and moved to the cathedral's chapter house. Three bone fragments were donated to Tadeusz Czacki in 1801, at his request. Czacki, a notable Polish historian, pedagogue, and numismatist, placed one of the bone fragments in his ancestral mausoleum in Poryck (now Pavlivka) in the Volhynia region; the other two were given to Princess Izabela Flemming Czartoryska, who placed them in her recently founded Czartoryski Museum in Puławy. After many historical twists, the burial place of Bolesław I ultimately remained at Poznań Cathedral, in the Golden Chapel. The content of his epitaph is known to historians. It is Bolesław's epitaph, which, in part, came from the original tombstone, that is one of the first sources (dated to the period immediately after Bolesław's death, probably during the reign of Mieszko II) that gave the King his widely known nickname of "Brave" (Polish: Chrobry). Later, Gallus Anonymus, in Chapter 6 of his Gesta principum Polonorum, named the Polish ruler as Bolezlavus qui dicebatur Gloriosus seu Chrabri. Family The contemporaneous Thietmar of Merseburg recorded Bolesław's marriages, also mentioning his children. Bolesław's first wife was a daughter of Rikdag, Margrave of Meissen. Historian Manteuffel says that the marriage was arranged in the early 980s by Mieszko I who wanted to strengthen his links with the Saxon lords and to enable his son to succeed Rikdag in Meissen. Bolesław "later sent her away", according to Thietmar's Chronicon. Historian Marek Kazimierz Barański writes that Bolesław repudiated his first wife after her father's death in 985 which left the marriage