A second historical tragedy, "A faithful Servant of his Lord" (""), 1826, performed 1828), attempted to illustrate a more heroic theme; but the subject of the superhuman self-effacement of Bancbanus before his lord Duke Otto of Meran proved too uncompromising an illustration of Kant's categorical imperative of duty to be palatable in the theatre. Liberal critics accused Grillparzer of promoting servility. At the same time, the play displeased the court, and its presentation was stopped. It hardly deserved to be made the subject of so much contention, for it is one of the least powerful of Grillparzer's later dramas.