The Symphony No. 18 in G major, Hoboken I/18, is a symphony by
Joseph Haydn. The composition date is conspicuously uncertain. The Breitkopf catalogue entry assures that it was composed no later than March 1766, the date of the Esterhazy orchestra moving to Esterhaza, but most scholars believe it was composed at least a few years before then. Dates between 1757 and 1764 have been also suggested but not proven.
The symphony is scored for 2 oboes, bassoon, 2 horns, strings and continuo. Although the symphony is in three movements, it has been sometimes categorized as in the sonata da chiesa style due to the presence of an entire opening slow movement. The three movements are:
The opening movement is written in the form of a trio sonata with two melodic lines over an independent bass.
