Constance of Wrocław (Polish: Konstancja wrocławska) (c.1221–27 – 21 or 23 February 1257) was a princess of Silesia and the duchess of Kuyavia.
[1] Constance and her siblings were brought up away from their parents at the monastery of Trzebnica, where they were cared for by their paternal grandmother Hedwig of Andechs.
[clarification needed] In 1239 at Wrocław, Constance married Casimir I of Kuyavia, the second son of Konrad I, Duke of Masovia.
The first theory is that Constance's father, Henry, for political reasons wanted a strong alliance with his potential enemy, Konrad I.
With Constance's sister Gertrude already married to Konrad's eldest son, her marriage would make a stronger alliance.
Due to the fact that the only three mentions of her death in the documents of Casimir I were from 1257 (3 May, 16 September, and 10 November), it is considered highly likely that she died earlier that year.