The phrase "Dance of Death" refers to a series of woodcuts created by Hans Holbein the Younger in 1523. The series depicts a group of people, ranging from the rich and powerful to beggars and peasants, facing their own mortality. Each image shows a person lying dead or dying while surrounded by symbols of the fragility of life.
The phrase "Dance of Death" is also used metaphorically to refer to any situation where people are confronted with their own mortality in a dramatic way. This could include natural disasters, war, or other catastrophic events that result in large numbers of deaths. In this sense, the phrase suggests that we are all equal in the face of death and that it can strike anyone at any time.