The high point of his career came in 1773, when he was commissioned to reproduce the painting 'The Dance of Death in Basel.'
But the project was very difficult to execute because the original painting had undergone countless renovations and changes.
This mural, which he painted on the wall of the Kleinbasel churchyard, has survived numerous onslaughts over the years.
Situated inside an abandoned nunnery, the mural has had better protection against weather, wear and tear, iconoclasms and renovations as compared to some of Büchel's other works.
Büchel's works, therefore, is the only source for ascertaining what the original painting looked like.