First sentence

As a header of the first is set to a Sonata or Symphony designated. In the majority of cases it takes the form of a sonata movement and is usually the thematically most substantial movement of the entire work. The counterbalance, at least in a symphony, is the final movement, which for this reason is also often built like a sonata main movement or a modification of it.

Individual evidence

1. ↑ first sentence. Duden online, Bibliographisches Institut, accessed on October 23, 2014 . 
2. ^ Rainer Cadenbach: From the symphony to the symphony. kultiversum, accessed on October 23, 2014 .