The pieces played before the start of class were Josquin des Prez, Absalom, fili mi:

and Guillaume Dufay, Ce jour de l’an:

 

Recordings of the music played in class are available here, arranged alphabetically by composer last name:

Anonymous, Kyrie eleison (c. 5th century)

 

Martin Luther, Eine feste Burg ist unser Gott (1528)

 

Giovanni Pierluigi da Palestrina (1524-95), Jesu, rex admirabilis

 

Pérotin, Viderunt omnes (c. 1200)

 

Giuseppe Verdi, Dies irae from Messa da Requiem (1874)