 Beethoven took one of the most popular pieces of this opera, a small segment of melody of ' ("Yes, I must leave her"), as the starting point for this trio.This line is from an aria sung by the village mayor Hans Christoph Nitsche, who is announces that he must leave his wife.Beethoven's variations were probably finished when he left Bonn – a short sketch from 1792 has survived – but were published as Op.