Mors Ultima Linea Rerum (Death, the Final Boundary of Things), Flemish print likely published by Philips Galle c. 1570 (via Wikipedia).
skeleton
Silent Sundays: The Body in the Library (1942)
Cover art by Rein van Looij for the Dutch edition of Agatha Christie’s 1942 The Body in the Library.
Silent Sundays: Three Skeletons at the Piano (1897)
Three Skeletons at the Piano, photographer unknown, 1897, via The National Archives.
The Year of Halloween 