The Moonlight Sonata, officially known as Piano Sonata No. 14 in C-sharp minor 'Quasi una fantasia', is one of Ludwig van Beethoven's most famous compositions. Completed in 1801, it is celebrated for its beautiful melodies and emotional depth, particularly in the first movement, which evokes a serene, moonlit night. This sonata consists of three movements, with the first being the most recognized. The piece showcases Beethoven's innovative approach to piano music, blending lyrical lines with rich harmonies. Its enduring popularity has made it a staple in the repertoire of many pianists around the world.