While writing during the period of Romanticism, Grillparzer's poetic language owes far more to the period of Classicism which reigned during his formative years. Committed to the classical ideals of aesthetic beauty and morality, his plots shy away from the realism which developed during his time, preferring instead to use the theater to address spiritual values, which in the words of the dying queen of his Libussa, would only come after the period of Materialism had passed. Due to the identity-creating use of his works, especially after World War II, he was named as the national poet of Austria.