Praeludium und Fuge in C BWV 547

As promised, a significant piece by JS Bach, about another great baroque organ, played by me these days, thanks to the loan of a key from my dear friend. I really enjoyed the beauty of the sound and the great work done by the MDA, in sampling this magical instrument.

The great Prelude and fugue in C major BWV 547 is an organ piece composed by J. S. Bach in Leipzig, presumably in the years 1738-1742. It is therefore one of the most important organ pieces composed by the German musician; it is a coeval composition with important collections such as the second volume of the well-tempered harpsichord, the Corali di Lipsia and the third part of the Clavierübung.
The Prelude as a whole, the work seems to be structured, like the Prelude and Fugue in E flat major BWV 552, as a great exaltation of the Holy Trinity; there are different aspects of this hypothesis.

The prelude opens with this thematic material exposed in canon to the eighth. This canonical exposition of the thematic material recurs several times in various shades: at each shot, the subject enters three consecutive times, again by octave fee.
Moreover, in the pedal, almost like an ostinato bass, appears a fanfare formed by descending notes, as if to symbolize the descent of Christ on the Earth. Apart from the symbolic point of view, the piece is also interesting from a harmonic point of view: Bach ranges, starting from the pure tonality of C major, in a vast harmonic path, contemplating also "distant" tones, often reached through sudden and surprising turns harmonic.
The Fugue is one of the most original, but also the most densely worked and counterpointistically complex of the entire Bach organ production (from Wikipedia).