Classical music has been regarded as the purest expression of human emotion for centuries. From Beethoven's 9th Symphony to Mozart's Requiem, these works carry the spirit of their time to the present day. The Vienna Classics - Haydn, Mozart, and Beethoven - are known for their groundbreaking compositions. In the 19th century, Romantic period composers like Chopin and Liszt emphasized emotional intensity. Today, classical music influences many areas from film scores to advertising jingles. Scientific research has shown that classical music enhances mental performance and reduces stress. The so-called "Mozart Effect" highlights the importance of classical music in children's cognitive development.