Demons using every effort to distract the men from their prayer; God the Father with angels; tortures in hell

In art, mementos mori are artistic or symbolic reminders of mortality. Memento mori is a Latin expression meaning "remember that you have to die". It was then reused during the medieval period, it is also related to the ars moriendi ("The Art of Dying") and related literature. Memento mori has been an important part of ascetic disciplines as a means of perfecting the character by cultivating detachment and other virtues, and by turning the attention towards the immortality of the soul and the afterlife.