Robert Schumann, sometimes known as Robert Alexander Schumann, was a German composer, aesthete and influential music critic. He is regarded as one of the greatest and most representative composers of the Romantic era. Schumann left the study of law to return to music, intending to pursue a career as a virtuoso pianist. He had been assured by his teacher Friedrich Wieck that he could become the finest pianist in Europe, but a hand injury caused by a device he created to develop the strength and independence of his fingers ended this dream. One of the most promising careers as a pianist had thus come to an end. Schumann then focused his musical energies on composing. Schumann's published compositions were written exclusively for the piano until 1840; he later composed works for piano and orchestra; many lieder (songs for voice and piano); four symphonies; an opera; and other orchestral, choral, and chamber works. His writings about music appeared mostly in the Neue Zeitschrift für Musik (New Journal for Music), a Leipzig-based publication which he jointly founded.