 147).While still in Vienna, Pixis was asked to join the collaborative work (involving 51 composers from 1819–1823) "Vaterländischer Künstlerverein", an anthology of variations on a waltz by Anton Diabelli, which also included Ludwig van Beethoven's "Diabelli Variations".In Paris in 1837, Pixis was involved with the composition of "Hexaméron" (six composers contributed; the third variation on Bellini's theme is by Pixis).