Piano Sonata No. 30 (Beethoven) 
 Hi there. Welcome to Wikipedia. I'm sorry I had to undo your first edit, but putting a  tag all by itself doesn't work. Without providing an actual citation, it just displays a red error message. In fact different sources take different views about the late sonatas' relation to Beethoven's other works. This is discussed (with sources) in the subsection on Beethoven's last sonatas (section 2.1 in the contents list). Regards,