Symphony No. 1 (Mozart) in the finale of his "Jupiter" symphony, No. 41. The four notes, Do, Re, Fa, Mi, make an appearance in several of Mozart's works, including his Symphony No. 33. This theme is stated by the horns in his first symphony. In his book on the Piano Concertos, Cuthbert Girdlestone pointed out the similarity between the opening of this symphony and that of Mozart’s Piano Concerto No. 22 K482, composed some twenty years later. Symphony No. 1 (Mozart) The Symphony No. 1 in E major, K. 16, was written in 1764 by Wolfgang Amadeus Mozart at the age of eight years.
Symphony No. 69 (Haydn) Symphony No. 69 (Haydn) The Symphony No. 69 is a symphony by Joseph Haydn in C major, Hoboken I/69, known as the "Laudon" symphony. Composed around 1775–1776, it represents a stylistic departure from the composer's earlier intense Sturm und Drang period and was written at the same time as Haydn was writing numerous comic operas. Despite the lighter tone, however, the symphony is "as finely crafted, as interesting, indeed as original, as the preceding ones, albeit very different in character." The nickname originated with Haydn's publisher Artaria, who issued a version for solo piano in the mid-1770s. As a device