La Cathédrale Engloutie (La Cathedrale Engloutie) by Claude Debussy is one of 24 pieces from his Préludes (Preludes) piano cycle. There are two books of Préludes, both containing twelve pieces each. La Cathédrale Engloutie is featured in the first book of Préludes (premier livre). All the pieces in the book are of a very impressionistic nature, creating rich sondscapes that give ample food for the listener's imagination. La Cathédrale Engloutie, which translates as "The sunken Cathedral" refers to the legend of the sunken city of Ys (in Brittany). There are several versions fo the story, but the main thread evolves around the part that the city, built below sea-level and protected by a dam, was flooded by the devil. In Debussy's piece, we can here the sunken cathedral slowly emerging from the flood, as the ringing of its bells becomes clearer and clearer, only for it to sink back into the sea towards the end of the piece.

Level 1.5 is unusually difficult for this Level.
Level 3.5 is shorter than the original, and many tricky passages in both hands have been simplified.