Runic dating system easter table
If she was Mieszko's sister, it is likely that they did not share the same mother, assuming that the estimated birth dates of Mieszko and Adelajda are both accurate.
It is probable that her second marriage was arranged in accordance with the Magyar tradition that the oldest male relative should marry the widow of a deceased relative (originally polygamously) and take care of his children. In 965, Prince Mieszko formed an alliance with Boleslav I Duke of Bohemia, confirmed by his marriage to the latter's daughter, the new queen influencing her husband's baptism at Easter 966 and being instrumental in the start of Poland's conversion to Christianity.
After her arrival in Poland, she converted Prince Mieszko to Christianity and was instrumental in the conversion of the whole country in 966The name of Toves father, "Mistiuis", on the Runic stone bears some similarity to Mstivoj.
However, one difficulty is the apparent chronological discrepancy.
The dispute was mediated in Quedlinburg in 973 by Emperor Otto.
Prince Mieszko left his son Bolesław at the German court as a hostage, but placed him under the protection of the Holy See by sending a lock of his son's hair to the Pope.
In 1000, Emperor Otto III visited Gniezno, recognised Polish independence, and established the archbishopric of Gniezno as an independent church metropolis covering the whole of Poland, on the authority of a special bull issued by Pope Sylvester II, triggering the Polish-German war which lasted until 1016.Adelajda's birth date range is estimated from the supposed dates of birth of her two sons by her first husband (before his death in [976/78]) and of her three known daughters by her second marriage after .The date range appears chronologically more consistent with her having been the daughter, rather than sister, of Mieszko, but this would be in direct contradiction to the sources quoted above.The Chronic Polanorum names "Boleslavum" as son of "Meschonem [et] Dubrovcam".He offered safe passage through Poland for St Adalbert, expelled as Bishop of Prague, who entered Prussia to convert the pagans.
This would place her birth after 966, later than suggested above, assuming that she was Mieszkos daughter by his wife Dobrava of Bohemia.