The tragedy begins in the year 1261. Ottokar is at the height of his powers, having recently defeated the Hungarians at the
Battle of Kressenbrunn, and the play opens with news that Ottokar is divorcing from his wife Margarete, on the grounds that she cannot bear an heir, and that they are in any case distantly related. Instead, he is to marry Kunigunde, young relative of the Hungarian King Bela, news which breaks the heart of Berta, one of Margarete's most beautiful ladies-in-waiting who Ottokar had previously seduced, as well as alienating her family, the Rosenbergs. Despite revealing that she never loved Ottokar, and only married him after the death of her first husband out of a sense of duty, Margarete is nevertheless deeply upset by this rejection and betrayal, although still waives her rights to retain the lands of Austria and Styria inherited from her first marriage. Ottokar then marries Kunigunde, who becomes his new queen, despite the age difference. Meanwhile, Zawisch Rosenberg is struck by her beauty, and sets out to seduce her behind Ottokar's back. Kunigunde, unimpressed by Ottokar's age and personality, is attracted by Zawisch and encourages his advances. Unaware of this, Ottokar is provisionally offered the crown of Holy Roman Emperor, however haughtily replies that he will take time to consider the offer. In this intervening period, a letter is rushed to an influential figure among the electors, the Archbishop of Mainz, outlining Ottokar's treatment of Margarete, and the crown is instead offered to the more worthy but lowly Duke Rudolf von Habsburg. In addition, it is announced that the states of Austria and Styria are deemed to have not been passed onto Ottokar following his divorce from Margarete. Ottokar is enraged by both these decisions, and both sides draw up forces on the banks of the Danube. Ottokar's chancellor persuades him to meet with the Emperor on an island on the Danube to discuss reconciliation. During these discussions, Ottokar indicates he is prepared pay homage to the imperial crown in the interests of peace, but is not prepared to concede his lands. However it is made clear to him that he his behaviour towards Merenberg and Margerete has alienated both Austrian and Styrian subjects, who now transfer their support to Rudolf. As a result, Ottokar is forced to withdraw his claims and be content with retaining the regions of Moravia and Bohemia. The ceremony for this requires him to kneel before Rudolf, and in the interests of decorum this is performed in a tented area. However, the mischievous Zawisch cuts the ropes of the tent, revealing Ottokar on his knees before his enemy, to all in attendance, including his own army. Ottokar then goes into hiding for two weeks, before returning to Prague weakened and in shame. On his return, representatives of the Emperor arrive demanding the release of a number of prisoners, one of the conditions of the peace treaty. At first Ottokar acquiesces, however on seeing Merenberg among the prisoners, his anger is piqued, and instead he tears up the treaty and demands that Merenberg be executed as a traitor, for his role in communicating the letter to the Archbishop of Mainz, and act which Ottokar considers to have been the starting point of all the subsequent betrayals. Merenberg is then executed by Ottokar's men, by flinging him from a tower. Ottokar is then spurned by Kunigunde, who openly tells him she has no respect for a man who kneels before his enemies. This further humiliation, spurs Ottokar to raise an army against all who defy him, attempting to restore his lost lands, power, and dignity. Kunigunde then flees with Zawisch, to seek protection from the Emperor Rudolf. On the eve of the battle with Rudolf's armies, Ottokar stumbles upon the deathbed of his former wife Margarete. Seeing her dead, having suffered at his hands, he regrets his treatment of her. As the battle draws up, Ottokar's remaining loyal lords urge him to act decisively to make the best of his strategic strengths, however he is by now hesitant and incapable of decisive action, as he begins to become aware of his tragic failings. Meanwhile, Emperor Rudolf, recognising with pity how so many of Ottokar's supporters have deserted him (including Kunigunde and Zawisch), orders that no one should kill Ottokar in battle other than in self-defence. However, when Seyfried von Merenberg encounters Ottokar on the battlefield, he seeks revenge for the death of his father, and forces Ottokar, lame through injury, into a fight, in which Ottokar is killed. On the battlefield, Rudolf, founder of the Habsburg dynasty, bequeaths the states of Styria and Austria to his children, and is hailed as a noble and gracious victor by all. == Characterisation ==