What organization did the woman, who Märta Ulfsdotter was the head lady in waiting of, found?
Margaret I of Denmark Margaret I (Danish: "Margrete Valdemarsdatter" , Norwegian: "Margrete Valdemarsdatter" , Swedish: "Margareta Valdemarsdotter" , Icelandic: "Margrét Valdimarsdóttir" ; 1353 – 28 October 1412), was queen consort of Norway 1363-1380 and Sweden 1363-1364, and later ruler in her own right of Denmark, Norway and Sweden, from which later period there are ambiguities regarding her specific titles. She was the founder of the Kalmar Union, which spanned Scandinavia for over a century. Margaret was known as a wise, energetic and capable leader, earning the nickname "Semiramis of the North", or "the Lady King". Though the latter was a derisive nickname invented by her rival Albert of Mecklenburg, it became widely used in recognition of her capabilities.
Roskilde Abbey Roskilde Abbey or Our Lady's Abbey, Roskilde ("Roskilde Kloster" or "Vor Frue Kloster") was a monastery of nuns dedicated to Saint Mary the Virgin in Roskilde in Denmark. It was founded in the early 12th century for Benedictine nuns, but in 1177 became part of the Cistercian reform movement.