D.The second note of the natural scale. In solfaing it is called Re. The scale of D major contains F♯ and C♯, and its relative minor is B; that of D minor contains B♭, and its relative major is F. The dominant of D is A.
Among the most important compositions in D major are the Missa Solennis and 2nd Symphony of Beethoven; Handel's Dettingen Te Deum; Mozart's Parisian Symphony. In D minor there are a noble Toccata and Fugue by Bach; the Choral Symphony, Schumann's Do. No. 4, Pianoforte Concertos by Mendelssohn and Brahms, etc.