Joseph Anton Bruckner was an Austrian composer and organist best known for his symphonies and sacred music, which includes Masses, Te Deum and motets. The symphonies are considered emblematic of the final stage of Austro-German Romanticism because of their rich harmonic language, strongly polyphonic character, and considerable length. Bruckner's compositions helped to define contemporary musical radicalism, owing to their dissonances, unprepared modulations, and roving harmonies.