He then left Bohemia with his family. In 1197, Ottokar became the Duke of Bohemia for a second time. This step, together with other maneuvers, helped him later to obtain the hereditary elevation of his title to king.
Adelheid did not waive her rights.
In 1205, she returned to Prague temporarily. However, Constance gave birth to a son, later King Wenceslaus I of Bohemia the same year.
Adelheid left Bohemia soon and died a few years later. In 1209, the new queen, now known as Dagmar, gave birth to Valdemar the Young.
Not many things are known about Dagmar as a person.
According to Rydårbogen (1250), queen Dagmar influenced Valdemar to release one of his most fervent enemies, Bishop Valdemar of Slesvig, in 1206. Most of the image of Dagmar comes from later folksongs, myths and legends, designed to present her as an ideal Christian queen. Mild, patient and universally loved, in contrast to her unpopular successor, Queen Berengaria.
Old folk ballads say that on her deathbed she begged Valdemar to marry Kirsten, the daughter of Karl von Rise, and not the "beautiful flower" Berengária of Portugal (Danish: Bengerd).
In other words, she predicted a struggle for the Danish throne between the sons of Berengaria. After Dagmar"s death, in order to build good relations with Flanders (a commercially important territory to the west of Denmark"s hostile southern neighbours), Valdemar married Berengária of Portugal in 1214. is buried in Saint Bendt"s Church in Ringsted, Denmark, on one side of Valdemar II, with Queen Berengária buried on the other side of the King.
Valdemar the Young was accidentally shot while hunting at Refsnæs in 1231. A pectoral cross now well known as the was found lying on the breast of remains when the tomb was opened about 1690.
The jewel of Byzantine design and workmanship, is of gold, enamelled, having on one side a crucifix, and on the other side portraits of Christ in the center, Street Basil, Street John Chrysostom, Mary the Virgin and Street John the Apostle-Evangelist.