You know what it looks like… but what is it called?
TAKE THE QUIZ“harmony of”
The following 2 entries include the term harmony of.
harmony of the spheres
: a doctrine promulgated by the Pythagoreans that the celestial spheres are separated by intervals corresponding to the relative lengths of strings that produce harmonious tones compare music of the spheres
harmony of vowels
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Merriam-Webster unabridged