which other art form inspierd mussorgsky to compose this work

The art form that inspired Modest Mussorgsky to compose his most famous work, "Pictures at an Exhibition," was visual art, specifically a collection of paintings by his close friend Viktor Hartmann. Each movement in the piece is meant to depict a different painting or scene from Hartmann's exhibition. Mussorgsky was deeply moved by Hartmann's art and sought to capture its essence through music.