Answer
Pictures at an Exhibition, originally composed by Modest Mussorgsky, was adapted for Emerson, Lake & Palmer (ELP) by keyboardist Keith Emerson. Emerson's adaptation retained the original's evocative themes and dramatic structure while incorporating ELP's signature blend of progressive rock, classical influences, and virtuosic musicianship. The result was a captivating and dynamic interpretation that showcased both the original composition's grandeur and ELP's innovative approach to music.