memento mori

 
Pronunciation: /mɪˌmɛntəʊ ˈmɔːri, -rʌɪ/

noun (plural )

  • an object kept as a reminder of the inevitability of death, such as a skull: he placed the picture in his room as a memento mori the skulls and bones on monuments were memento mori

Origin:

Latin, literally 'remember (that you have) to die'