Austrian composer, music publisher, and pianist best known for providing the simple waltz theme that inspired Ludwig van Beethoven's monumental 'Diabelli Variations'.Born near Salzburg, Diabelli trained as a priest before pursuing music. He moved to Vienna in 1803, establishing himself as a successful piano teacher and composer of light, accessible works. In 1818, he co-founded the publishing firm Cappi & Diabelli (later Diabelli & Co.), which became one of Vienna's leading music publishers, ...