Although the young Schumann seemed to prefer writing short pieces, he became more interested in long works after meeting Mendelssohn. He was also inspired to write symphonies after he discovered Schubert’s Symphony no 9 which no one knew that Schubert had written. He found it in a box in Vienna at the house of Schubert’s brother. Schumann wrote four symphonies. One of his best is the Third which is often called the "Rhenish" Symphony (after the river Rhine). The Fourth in d minor is also a great work. Using only a few musical ideas he develops them in many ways and writes a long, four-movement work. His piano concerto is a great favourite. Clara Schumann played it with the Leipzig Gewandhaus Orchestra at its first performance on New Year’s Day 1846.