Page "Mary, Queen of Hungary" Paragraph 4

Louis had no problem in having his daughter's rights to the Holy Crown of Hungary recognized, but it took a set of concessions known as the Privilege of Koszyce to establish Catherine as heiress presumptive and further bargaining with the Estates on Mary's behalf after Catherine's death in 1378.

The Polish nobles finally accepted Mary as their future sovereign and paid homage to her in 1379.

In 1382, shortly before his death, Louis persuaded them to swear an oath of fealty to Sigismund as well.