This document provides an overview of different musical eras from antiquity to the present, including notable composers and instruments of each era. It discusses eras such as the medieval era with composers Léonin and Landini, the Renaissance era featuring Josquin Des Prez and Palestrina, and the Baroque era with Bach and Handel. Later eras examined include the Classical period with Mozart and Beethoven, the Romantic era highlighting Wagner and Berlioz, and the 20th century focusing on Debussy and Stravinsky. The document concludes with the contemporary era and composers like Cage and Reich.