5 Things to Know About Beethoven’s String Quartet No. 15

It has five movements instead of the usual four. This makes it one of Beethoven’s longest and most unusual quartets.

The third movement is a slow, solemn fugue. It was written after Beethoven recovered from a serious illness and reflects his gratitude.

The fourth movement is a lively dance. It contrasts sharply with the preceding fugue and lightens the mood.

The entire piece lasts about 45 minutes. That’s longer than most of his other quartets.

It was composed in 1825, late in Beethoven’s life. By then he was completely deaf, yet the music remains deeply expressive and structurally innovative.