Arnold Schoenberg's Piano Concerto, Op. 42 (1942) is one of his later works, written in America. It consists of four interconnected movements: Andante (bars 1–175), Molto allegro (bars 176–263), Adagio (bars 264–329), and Giocoso (bars 330–492). Around 20 minutes long, its first performance was given on February 6, 1944, at NBC Orchestra's Radio City Habitat in New York City by Leopold Stokowski and the NBC Symphony Orchestra with Eduard Steuermann at the piano. The first UK performance was on 7 September 1945 at the BBC Proms with Kyla Greenbaum (piano) conducted by Basil Cameron. The first German performance took place at the Darmstadt Summer School on 17 July 1948 with Peter Stadlen as the soloist. Commission The concerto was initially the result of a commission from Oscar Levant. Despite paying at least $200 for the work, Levant found out that Schoenberg was demanding $1500. Levant stated he could not pay that fee, and although the two continued to exchange telegrams, in October 1942, Schoenberg rejected Levant's final offer of $500. Levant ended all negotiations stating, "I hereby withdraw utterly and irrevocably from any further negotiations... [and] wish no longer to be involved in [the concerto's] future disposition." Fortunately another American student stepped in to commission the concerto. Henry Clay Shriver (1917–1994) studied counterpoint with Schoenberg at UCLA in the late 1930s, and then studied with Gerald Strang, a former teaching assistant of Schoenberg, in Long Beach in the 1940s. Shriver opted for a career in the law instead of music, which might explain his access to funds for the commission. Strang suggested the idea of the commission to Shriver, who then wrote Schoenberg a check for $1000. He had already commissioned a string quartet from Schoenberg, who never finished the work, and had also kept in contact with the composer after his UCLA studies, being present at Schoenberg's home with other colleagues and students for the radio broadcast of the Chamber Symphony No. 1 in December 1940. Gratefully, Schoenberg completed the concerto in December 1942 and dedicated it to his new patron, who held an original version of the work until his death in 1994. Twelve-tone technique The piece features consistent use of the twelve-tone technique and only one tone row ("the language is very systematic, it's the true dodecaphonic Schoenberg",) though not as strictly as Schoenberg once required (for example, the ninth, tenth and eleventh tones of the series