Assistir Assistir PobreTV. Under the guidance of famed American composer and conductor Leonard Bernstein, Polish classical pianist Krystian Zimerman and the Vienna Philharmonic deliver a rousing performance of Ludwig van Beethoven's Piano Concertos nos. 3, 4 and 5. Premiered in 1808, Beethoven's fourth concerto marked the last time the composer would take the stage as a soloist with an orchestra.