Memento Mori - To This Favour, one of the most famous William Michael Harnett paintings.
A memento mori painting or sculpture is one designed to remind the viewer of their mortality and of the brevity and fragility of human life in the face of God and nature. A basic memento mori painting would be a portrait with a skull but other symbols commonly found are hour glasses or clocks, extinguished or guttering candles, fruit, and flowers. Closely related to the memento mori picture is the vanitas still life. In addition to the symbols of mortality these may include other symbols such as musical instruments, wine and books to remind us explicitly of the vanity (in the sense of worthlessness) of worldly pleasures and goods. The term originally comes from the opening lines of the Book of Ecclesiastes in the Bible: 'Vanity of vanities, saith the Preacher, vanity of vanities, all is vanity.' The vanitas and memento mori picture became popular in the seventeenth century, in a religious age when almost everyone believed that life on earth was merely a preparation for an afterlife. However, modern artists have continued to explore this genre.