She was a daughter of Valdemar, King of Sweden and Sophia of Denmark, daughter of the King Eric IV. She was certainly born before 1273, because by that year she and her sister Katharina were considered for possible marriage with Otto, only son and heir of John, Duke of Brunswick-Lüneburg.
However, the marriage negotiations ended without results. Her marriage by proxy with Przemysł II, Duke of Greater Poland, took place in the Swedish city of Nyköping on 11 October 1285. In the same ceremony, Richeza"s younger sister Marianne (or Marina), was married to a German nobleman, Count Rudolph II of Diepholz.
Richeza"s marriage, concluded through the mediation of the House of Ascania, rulers of Brandenburg, was performed without the consent of her father, ex-King Valdemar.
In the proxy marriage the Polish Duke was represented by the notary Tylon, one of his closest subjects. There is no information about when and where the formal marriage took place between Przemysł II and Richeza.
Traditionally, Richeza and Przemysł II"s marriage is described as happy. Their only child was born on 1 September 1288 in the city of Poznań: a daughter, named Richeza, who later became in Queen consort of Bohemia and Poland as a wife of Wenceslaus II and after his death, of Rudolph III of Habsburg.
She certainly died between 1 September 1288 and before 13 April 1293, most likely between 1289-1292.
The reports of January Długosz, who placed her next to her husband in his royal coronation on 26 June 1295, proved to be erroneous. Richeza was buried in the Archcathedral Basilica of Saint Peter and Saint Paul in Poznań. After Przemysł II"s murder in 1296 and following his wishes, he was buried next to her.
