Variations on a theme of joseph haydn, op 56a "chorale st antoni" Variations on a theme by Joseph Haydn, op.56a Variations on a theme by Joseph Haydn, op. 56a Variations on a theme by Joseph Haydn op.56a Variations on A Theme of Joseph Haydn Op.56a Variations on a Theme by Joseph Haydn,op.56a Variations on a Theme by Josepyh Haydn op.56a Varations on a theme of Corelli in the style of Tartini Variations on a Theme of Corelli in the Style of Tartini Variations on a theme by Joseph Haydn: in B-flat major, op. 56a