La cathédrale engloutie L.117
Piano solo ~4 min
In brief

The piece is wrapped in a misty, majestic mood, as if broad sonorities slowly rise from a watery distance, alternating vast resonance and suspended silences. You will need to focus particularly on Balance hands (4.8/5) — here that means projecting the melodic line through the harmonic texture while keeping the other hand subdued yet resonant — and Octaves (4.8/5), which require even attacks and controlled legato across wide spans to preserve the piano’s orchestral clarity. The work holds a key place in Debussy’s piano output as an example of his exploration of atmospheric color and pictorial effect. A frequently cited reference recording is by Walter Gieseking, with notable historical readings by Claudio Arrau.

MusicCoach difficulty
81/100
Master repertoire
Likely range : 72–90/100
Confidence : 58% · fair confidence
BeginnerIntermediateAdvancedVirtuoso
Exam grade
On the syllabus: Grade 8 ABRSM

Official level, taken from the exam syllabus.

Difficulty estimate by MusicCoach on a scale of 1 to 100.

Where this work sits
050100

Most works cluster between 45 and 65: a small score gap often marks a real step. The highlighted bar shows this work among those for the same instrument.

The MusicCoach difficulty measures a work's overall demands (technique, reading, stamina) on a shared 0-100 scale, consolidated from editorial and pedagogical reference points (Henle, exam syllabuses, curation) and our own analyses. It measures neither musical value nor the practice time YOU will need: two musicians of the same level can experience the same work very differently depending on their strengths (hands used to octaves, quick sight-reading…). The confidence reflects how many reference points sit behind the score and how well they agree — a lightly documented score is flagged “to validate”. For a truly personal bearing, the diagnostic and your space compare each work to YOUR estimated level, which the score alone cannot do.

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Difficulty sources
ABRSM (syllabus)
Grade 8
76/100 normalised
Relative difficulty
96%
Among Claude Debussy
97%
Era
Genre
Estimated skills
Tone
Hand balance
1
Technique
Octaves
1
Pedaling
Sustain pedal
1
Tone
Touch control
2
Interpretation
Dynamics
2
Pedaling
Half-pedalling
1
Style
Impressionist style
1
What to play next?

Each suggestion combines difficulty gap, risk, confidence and skill overlap. The first two cards in each column are the most useful pedagogically.

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