Johann Sebastian Bach was a German composer, organist, and teacher whose music became one of the highest achievements of the Baroque era. He lived from 1685 to 1750 and worked in courts, churches, and schools across central Germany. His music matters because it combines deep emotion, mathematical structure, religious purpose, and dazzling craft.
Bach did not invent every Baroque technique, but he brought counterpoint, harmony, and form to an extraordinary level of clarity and power.
Bach is especially famous for fugues, chorales, keyboard works, concertos, cantatas, and sacred masterpieces such as the Mass in B Minor. As a Lutheran church musician in Leipzig, he wrote music for worship, education, and civic life while training singers and instrumentalists. Works such as The Well-Tempered Clavier explored all 24 major and minor keys and helped demonstrate the expressive range of keyboard tuning.
His legacy shaped later composers including Mozart, Beethoven, Mendelssohn, and many modern musicians who study structure, voice leading, and musical invention.
Key Facts
- Johann Sebastian Bach lived from 1685 to 1750 and is closely associated with the late Baroque period.
- A fugue begins with a main theme called the subject, which enters successively in different voices.
- The Well-Tempered Clavier contains 24 preludes and fugues in Book I and 24 in Book II, so 24 + 24 = 48 total pieces.
- There are 12 major keys and 12 minor keys in the chromatic system, so 12 + 12 = 24 keys.
- The Brandenburg Concertos are a set of 6 concertos that show Baroque contrast, dialogue, and instrumental color.
- In common time, one measure often has 4 quarter-note beats, so 1 whole note = 4 quarter notes.
Vocabulary
- Baroque
- A European artistic period from about 1600 to 1750 known in music for contrast, ornamentation, basso continuo, and expressive drama.
- Counterpoint
- Counterpoint is the technique of combining independent melodic lines so they sound harmonious together.
- Fugue
- A fugue is a contrapuntal composition in which a main theme enters in different voices and is developed through imitation.
- Basso continuo
- Basso continuo is a Baroque accompaniment system using a bass line and chords, often played by keyboard and a low instrument.
- Chorale
- A chorale is a Lutheran hymn tune that Bach often harmonized for congregational worship or used as the basis for larger works.
Common Mistakes to Avoid
- Calling Bach a Classical-period composer is incorrect because his life and style belong mainly to the late Baroque era, before composers such as Haydn and Mozart.
- Thinking counterpoint means all voices play the same melody at the same time is wrong because counterpoint depends on independent lines that interact carefully.
- Assuming a fugue is just any fast keyboard piece is incorrect because a fugue is defined by subject entries, imitation, and structured development.
- Treating Bach only as a church composer misses his wider output because he also wrote concertos, suites, keyboard works, teaching pieces, and secular music.
Practice Questions
- 1 The Well-Tempered Clavier has 2 books, and each book contains 24 preludes and fugues. How many total pieces are in both books?
- 2 If Bach was born in 1685 and died in 1750, how old was he when he died? If he moved to Leipzig in 1723, how old was he then?
- 3 Explain why a fugue is a strong example of Baroque musical thinking. In your answer, refer to imitation, independent voices, and organized structure.