Albert Einstein worked primarily in the field of physics. However, his work had significant implications for other fields, including:

* Mathematics: Einstein developed new mathematical concepts to describe his theories, particularly in the area of differential geometry.

* Cosmology: His theory of general relativity revolutionized our understanding of the universe and its origins.

* Philosophy: Einstein's work challenged traditional notions of space, time, and gravity, leading to profound philosophical discussions.

While Einstein's main contribution was in physics, his work touched on other areas and influenced their development.