What is the main theme of a fugue called?

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4. What is Air on the G String?
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6. What is The Well Tempered Clavier?
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Tags

1. #technique
2. #composition
3. #imitation
4. #built
5. #repetition
6. #frequently
7. #different
8. #subject
9. #course
10. #pitches
11. #fugue
12. #introduced
13. #voices
14. #recurs
15. #music
16. #compositional
17. #theme
18. #beginning
19. #contrapuntal