The circle of fifths is a conceptual diagram that serves as an aid in memorizing key signatures and helps us understand the relationships between the various keys. The 15 key signatures are arranged in a circular clock-like fashion, with the enharmonic key signatures doubling up in the 5, 6, and 7 o’clock positions. In **Example 1** below, major keys are listed outside the circle, with their corresponding relative minor keys inside the circle. The key of C major with no sharps or flats is in the 12 o’clock position. Proceeding in clockwise fashion, the keys are arranged by ascending fifths—G major (one sharp), D major (two sharps), A major (three sharps), and so on. Proceeding in counterclockwise fashion, the keys are arranged by descending fifths—F major (one flat), B♭ major (two flats), E♭ major (three flats), and so on. **Example 1.** Circle of fifths for major and minor keys. ![[circle of fifths major and minor keys.png]]