Essentials of Music

Essentials of Music - "Whether you're a casual listener or a serious music student, here's the site for basic information about classical music." The main sections are;
Eras: Overviews of the six main periods in music history -- Middle Ages, Renaissance, Baroque, Classical, Romantic and Twentieth Century.
Composers: Brief biographies of nearly 70 composers, which will bring to life the artists and their works.
Glossary: 200 definitions with numerous musical examples.