Mileva Marić, sometimes called Mileva Marić-Einstein, was a Serbian physicist, mathematician, and the first wife of Albert Einstein from 1903 to 1919. She was the only woman among Einstein's fellow students at Zürich Polytechnic. Marić and Einstein were study colleagues and lovers, and had a daughter Lieserl in 1902, who likely died of scarlet fever at one and a half years old. They later had two sons, Hans Albert and Eduard.

Albert Einstein was a German-born theoretical physicist who is widely held to be one of the greatest and most influential scientists of all time. Best known for developing the theory of relativity, Einstein also made important contributions to quantum mechanics, and was thus a central figure in the revolutionary reshaping of the scientific understanding of nature that modern physics accomplished in the first decades of the twentieth century. His mass–energy equivalence formula E = mc2, which arises from relativity theory, has been called "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory. His work is also known for its influence on the philosophy of science.