Harmonic Analysis - B Section

The form of the 'B' section is aba1. The 'B' Section starts on the V and cadences to the I chord in measure 36 and then again in measure 40. In measure 41, Beethoven moves far away from the key of C with a III chord that does not move back into the key of C until measure 47. Measure 47 moves back into the theme that was established in measure 33. The remainder of the 'B' section plays out as a very long deceptive cadence ending at measure 54 on the vi chord.