Guido of Arezzo's "Micrologus"The innovation of the 4-line staff, relative pitch, sight-singing syllables, and accidentals.
Hildegard of Bingen birth
Hildegard of Bingen death
Ars Nova Treatisenew art: invented the modern notation and metered music
Josquin's Motet: Ave Maria...virgo serena
"Ein feste burg ist unser Gott" (A Mighty Fortress is our God)Martin Luther Chorale
"Il bianco e dolce cigno"Arcadelt Madrigal
"Pope Marcellus Mass"Giovanni Pierluigi da Palestrina
demonstrated that sacred words could be intelligible in polyphonic music with 6 voices.
Motet: "O magnum mysterium"Tomas Luis de Victoria
"Sonata pian 'e forte"Giovanni Gabrieli, Venice Italy. Church of St. Mark
one of the first pieces that specified which instrument played which part and the first piece of music that designated dynamics.