Sinfonia
Italian for symphony, with two meanings. In Bach's keyboard music it is a three-part counterpart of the two-part invention; in 17th- and 18th-century orchestral music it is an instrumental piece that introduces an opera, cantata or suite, and after about 1800 it simply meant overture.
Source: Sinfonia (Wikipedia)
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BachSinfonia No. 1 in C major, BWV 787
BachSinfonia No. 3 in D major, BWV 789
BachSinfonia No. 6 in E major, BWV 792
BachSinfonia No. 7 in E minor, BWV 793
BachSinfonia No. 8 in F major, BWV 794
BachSinfonia No. 13 in A minor, BWV 799
BachSinfonia No. 14 in B♭ major, BWV 800
BachSinfonia No. 15 in B minor, BWV 801
MozartSinfonia concertante in E-flat major, K. 364