the ancient music period, before 500 AD
the early music period, which includes
the Medieval (500–1400) including
the ars antiqua (1170–1310)
the ars nova (1310–1377)
the ars subtilior (1360–1420)
the Renaissance (1400–1600) eras.
Baroque (1600–1750)
the galant music period (1720s–1770s)
the common-practice period, which includes
Baroque (1600–1750)
the galant music period (1720s–1770s)
Classical (1750–1820)
Romantic eras (c.1780–1910)
the 20th and 21st centuries (1901–present) which includes:
the modern (1890–1930) that overlaps from the late- 19th century,
impressionism (1875 or 1890–1925) that also overlaps from the late- 19th century
neoclassicism (1920–1950), predominantly in the inter- war period
the high modern (1930–present)
the postmodern (1930–present) eras
the experimental (1950–present)
contemporary (1945 or 1975–present)
European art music is largely distinguished from many other non-European classical and some popular musical forms by its system of staff notation, in use since about the 11th century. Western staff notation is used by composers to indicate to the performer the pitches (which form the melodies, basslines and chords), tempo, metre and rhythms for a piece of music. This can leave less room for practices such as improvisation and ad libitum ornamentation, which are frequently heard in non-European art music and in popular- music styles such as jazz and blues. Another difference is that whereas most popular styles adopt the song (strophic) form or a derivation of this form, classical music has been noted for its development of highly sophisticated forms of instrumental music such as the symphony, concerto, fugue, sonata, and mixed vocal and instrumental styles such as opera, cantata, and mass.
The term "classical music " did not appear until the early 19th century, in an attempt to distinctly canonize the period from Johann Sebastian Bach to Ludwig van Beethoven as a golden age. The earliest reference to "classical music " recorded by the Oxford English Dictionary is from about 1829.