Siesta by Ernst Ludwig Kirchner, c. 1911

The Princess and The Pea by Edmund Dulac - 1910

A Tiger for a Bed, The Sandman's Forest - 1918

Using the Moon for a Bed, Earthology - 1901

The Sleep of Reason Produces Monsters by Goya - 1799

Evening Wind by Edward Hopper - 1921

King Hobgoblin Sleeping by Hugo Simberg - 1896

Retiring by Edgar Degas - 1883

Turning Out the Light, from New York City Life by John Sloan - 1905

The Artist's Wife Asleep by Lovis Corinth - 1902–03