Music
Music Through the Ages (Ancient to Romantic)
Ancient
Ancient Greek Music (Ancient History Encyclopedia)
Ancient Music and Instruments from the Mediterranean (Ancient History Et Cerera)
Characteristics of Ancient Music: An Introduction (CMUSE)
Greek Music (Encyclopedia Britannica)
How Did Ancient Greek Music Sound? (BBC News)
Music in Ancient Greece (The Met)
Medieval
Characteristics of Medieval Music: An Introduction (CMUSE)
Renaissance
Characteristics of Renaissance Music (CMUSE)
Music in the Renaissance (The Met)
Renaissance Music 1400-1600 (Victoria and Albert Museum)
The Renaissance - Part 6: Music (Italy Magazine)
Baroque
Baroque Music (Baroque Music Pages)
Baroque Music (Encyclopedia Britannic)
Characteristics of Baroque Music: An Introduction (CMUSE)
What is Baroque Music? (Music of the Baroque)
Classical
10 Classical music Composers to Know (Encyclopedia Britannica)
Classical Music (Encyclopedia Britannic)
Classical-Music (BBC Music Magazine)