[3] The wedding was probably orchestrated by Bolesław's mother Salomea of Berg, who wanted to secure a Russian alliance against her stepson, the later Władysław II the Exile.
In 1141 Viacheslava accompanied her husband at the meeting of Łęczyca, convened at the initiative of her mother-in-law Dowager Duchess Salomea.
[4] Prince Bolesław died in 1172 aged sixteen, and reportedly his father was devastated by his early death.
One year later (1173), High Duke Bolesław IV died, leaving his Masovian-Kujavian principality to his second and only surviving son Leszek, at the age of eleven or less.
As overlord and holder of Kraków and Gniezno, he however was succeeded by his next brother Mieszko III the Old, Duke of Greater Poland.