Beethoven's Piano Sonata No. 28, Op. 101 is notable for its experimental structure,
merging a sonata-form finale with a fugal development section—a bold synthesis of Classical
and Baroque techniques that foreshadows his late-period style.
This sonata marks Beethoven's transition to late-period style, featuring experimental structures and intimate expression. The fourth movement's fugue foreshadows his monumental Hammerklavier Sonata.