It was Dimitri Mitropoulos, when he conducted in New York von Einem’s Orchestermusik op. 9 in 1953, who had asked von Einem to write a Piano Concerto for him, and originally it was he who intended to both play the solo part and to conduct the orchestra. Wanting the score well enough in advance to prepare the solo part, already in the spring of 1954 he wrote to Einem "I am waiting anxiously." But von Einem in the end took too long to complete the work for the very busy conductor to prepare it in time. The present short score of the second movement was sent to him at some point and later he sent copies of the completed score, but von Einem’s Piano Concerto op. 20, dedicated to Alma Mahler Werfel, was first performed by Gerty Herzog with the Sinfonieorchester des Norddeutschen Rundfunks, conducted by Hans Schmidt-Isserstedt, October 6, 1956.
Mitropoulos was slated to conduct (not play) the work with Gerty Herzog as soloist and the Vienna Philharmonic Orchestra at the Salzburg Festival 1957 (with works by Honegger and Theodor Berger), but finally he was again too busy (Elektra, two orchestra concerts with "classical“ works) and Herbert von Karajan took over this concert with music of the 20th century. Karajan conducted the concert also with Gerty Herzog and the WPH in Vienna.
It was Dimitri Mitropoulos, when he conducted in New York von Einem’s Orchestermusik op. 9 in 1953, who had asked von Einem to write a Piano Concerto for him, and originally it was he who intended to both play the solo part and to conduct the orchestra. Wanting the score well enough in advance to prepare the solo part, already in the spring of 1954 he wrote to Einem "I am waiting anxiously." But von Einem in the end took too long to complete the work for the very busy conductor to prepare it in time. The present short score of the second movement was sent to him at some point and later he sent copies of the completed score, but von Einem’s Piano Concerto op. 20, dedicated to Alma Mahler Werfel, was first performed by Gerty Herzog with the Sinfonieorchester des Norddeutschen Rundfunks, conducted by Hans Schmidt-Isserstedt, October 6, 1956.
Mitropoulos was slated to conduct (not play) the work with Gerty Herzog as soloist and the Vienna Philharmonic Orchestra at the Salzburg Festival 1957 (with works by Honegger and Theodor Berger), but finally he was again too busy (Elektra, two orchestra concerts with "classical“ works) and Herbert von Karajan took over this concert with music of the 20th century. Karajan conducted the concert also with Gerty Herzog and the WPH in Vienna.