She was pretty in her youth, and some time later was chosen by Maria Anna of Bavaria to become mistress to King Sigismund III of Poland.

[3] When Sigismund III married again in 1605 in Kraków with a sister of his first wife, Constance of Austria, Urszula became her "close worries and consolations participant".

[4] In 1617 during Władysław's expedition against Russia to regain the tsar's throne, he asked of her intervention in favour of Marcin Kazanowski who came into dispute with the Grand Hetman of Lithuania, Jan Karol Chodkiewicz.

During the last year of Sigismund's life he was often seriously ill and Urszula become the real Polish Duke of Lerma, leaving him an increasingly peripheral figure.

[2] After the King's death in 1632 the imperial diplomat Arnoldin Mathias von Clarstein who came to Warsaw, turned with his requests first to Urszula who promised to support him in his efforts to obtain a loan.

[3] When Urszula frightened the sum demanded, Prince Władysław unexpectedly entered the audience chambers of the deceased King, he found us sitting together, smiled and asked me if it's not the right time for us to deal with the matter on the outside, in the winter garden, as long as uberius coram de quo.

Soutman or Christian Melich (Polish court painters), were destroyed when the Royal Castle in Warsaw was ransacked and burned down during the Deluge.

[3] But it is more likely the mature blonde dressed according to Imperial court fashion and facing the King to represent Sigismund's mistress who was almost 30 at that time, than the effigy of a youth brunette in Polish costume as it is supposed.