As mentioned, historians estimate that this fantasia was composed in 1782, mainly because of its similarities to his Prelude (Fantasy) and Fugure in C major, K. 394, also written in 1782, as well as another fantasy and a suite.
When Mozart moved to Vienna in 1781, he began to seriously study the works of Bach and other Baroque composers. This study would influence many of his later compositions (he liked incorporating counterpoint and polyphony into his later works, just like the Baroque style).
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